If you plunge deep into history, you need to understand that for each individual city, not to mention countries, there were their own concepts of weight, length, time. The measure of weight in every corner of the planet had its own, it was measured in ounces, pounds, measures, pounds and other units, and even the same names did not guarantee the weight match. It was the same with length, ranging from small measurements to distances between cities. But until the end of the eighteenth century, no one would have understood the question “how many kilograms in 1 liter?”, Because such names did not even exist.

Over time, when states came to unity of command, and international trade began to develop actively, a need arose for universal standardization. And if within each individual country the unification of measurements occurred almost simultaneously with the formation of this very country, then the world community approached uniform international standards in the second half of the nineteenth century.

The names "meter" and "kilogram" themselves appeared in France in 1795. After the victory of the French Revolution, the new authorities decided to get rid of everything that looked like a monarchy. The changed names of the months of the year, days of the week did not last long, but the roots of the new units of measurement of the entire world community originate precisely in France. It was there that they first answered the question “how many kilograms are in 1 liter of water?”.

Metric system

The word "liter" got its name from the old French "litron", which denoted the measure of bulk solids. And the old French term has its roots in ancient Greece and ancient Rome. After the French Revolution, the liter became the new unit of measurement for volume. And in the same 1795, they determined how much a kilogram weighs 1 liter of water. To begin with, we determined how much one reference gram was. He weighed like one cube of melt water with an edge of one hundredth of a meter. And since a gram was a rather small quantity, not convenient for making a standard, a unit one thousand times heavier than a gram was taken as a standard. And, accordingly, the volume was “adjusted” under it. Therefore, to the question “how many kilograms are in 1 liter of water?” the only answer is "one". But the system, which was based on the meter and kilogram, received international recognition only in the last quarter of the nineteenth century, when seventeen states, including Russia, at a meeting in Paris confirmed the Meter Convention with their signatures.

SI system

The Convention served as the basis for the creation of the International Bureau of Weights and Measures, the purpose of which was precisely the organization of a unified system of measurements. This system became the foundation for the emergence in 1960 of the International System of Units (SI). In this system, there was no place for a liter, but bringing measurements to a single standard allows you to answer the question at any time, how many kilograms are in 1 liter of any substance.

Liter measurements

“>Water was initially taken as the standard of mass in the state of melting ice. After that, the definitions changed, and water at the temperature of the highest density and the normal state of the atmospheric phenomenon became the sample of one kilogram. It follows from this that a substance, in this case water, even in a 1 liter container can have a different weight. Therefore, when asked how many kilograms are in 1 liter, one should also specify atmospheric pressure and water temperature. And again, when it is not about water, the weight of one liter will vary significantly. Thus, the heaviest liquid in its natural state - mercury - is more than thirteen times heavier than water. And, for example, vegetable oil is lighter than water, and if you pour oil into water, an oil film forms on the surface. Given that one liter corresponds to one cubic decimeter, liters can be used to measure not only liquid substances, but also solid ones. The hardest known substance - osmium - is 23 times heavier than water, and the ice that forms when water freezes has a lower density, and therefore is located on the surface of the water. How many kilograms in 1 liter depends on what we measure.

measuring utensils

“> And where solid substances are measured in liters, loose ones also appear there. And in the old days, it was bulk substances that determined the volume of dishes, wheat served as a standard for this. And in the modern world, measuring utensils come to the aid of all housewives. With its help, you can safely answer the question of how many kilograms are in 1 liter, and by no means water. After all, everything is clear with water. Depending on the need, measuring utensils can measure how much cream, milk, perhaps even flour or cereals are in one liter. Or maybe not in one liter, but only in a glass. Measured utensils will show how many kilograms, pounds or ounces are in 1 liter, depending on which country's recipe will be being prepared at the moment. If you don’t have measuring utensils at hand, reference books will help, which, to the nearest gram, will tell you about the capacity of one liter in relation to all kinds of products.

History of water

When asked how much a liter of water weighs in kilograms at different times, they answered differently. So, back in 1793, they adopted today's unit of measurement of liquid - a liter. And the French did it. And only in 1879, at the International Committee of Weights and Measures, it was decided to equate a measure of one liter to one cubic decimeter.

Already in the 20th century (1901), experts confirmed the equality of 1 liter of water to one kilogram of the same liquid. But, only under the condition of maintaining a temperature of 3.98 degrees Celsius, and atmospheric pressure - 1 atmosphere. Under such conditions, the cubic decimeter equivalent was slightly different. So, 1 liter of water already weighed 1.00002 cubic decimeters.

In order not to get confused in these measures, in 1964 the International Committee again equalized the measures of a liter and a cubic decimeter. To maintain this balance, it is important that the water is pure, without additives. Ordinary drinking water contains minor impurities of salts, which have an impact on its weight, a measure of measurement.

What affects the weight of water?

From the lessons of physics, we know that there are some differences between mass and volume. Mass measures the size of an inert body, and it is determined by kilograms. Water, like a liquid, is measured in volumes. To determine how many kilograms in one liter of water, you need to consider some factors. The following indicators affect the mass of water:

• Pressure (atmospheric);
• Temperature;
• Aggregate state of the liquid;
• Type of water (with salt, fresh);
• Type of hydrogen isotope.

At different states of aggregation, the density of water changes. Thus, the maximum density is observed at the moment of freezing of the liquid. If the air temperature has a positive value, the amount of liquid begins to increase, it becomes light. Therefore, ice always floats on the surface and never sinks. Therefore, in the table, the following water weight indicators can be distinguished depending on the state of aggregation:

The mass of salt water is slightly increased. So, 1 liter of salty liquid weighs 1 kilogram and 24 grams. It also affects atmospheric pressure.

How many kilograms are in 1 liter of water?

If we take into account all indicators, external factors, it is fashionable to calculate the weight of a liquid in 1 kg. How many kilograms are in 5 liters of water? So, at room temperature of 20 degrees Celsius, and atmospheric pressure of 760 millimeters of a mercury column, the mass will be as follows:

• 1 liter = 1 kilogram;
• 5 liters = 5 kilograms;
• 10 liters = 10 kilograms.

In the case of other temperature "plus" values, the mass of 1 liter of water will be 998.6 grams. The liquid from the tap is also different from pure distilled. To identify the mass of tap water, you need to determine what impurities it contains. Based on chemical indicators, the weight of the liquid will be calculated using a special formula.

The weight of one liter of water weighed at an atmospheric pressure of 760 mm and a temperature of the highest density of water of 4 ° C is approximately 998.5 grams.

The weight of one liter of water is approximately 998.5 grams.

Water is the most unusual liquid on our planet. Indeed, thanks to water, not only life on Earth appeared, but also many important inventions that played a huge role in the development of the technical progress of mankind. It's all about the amazing properties of water, which can easily go from a liquid state to a solid or gaseous state. In everyday life, it often becomes necessary to determine the mass of this liquid - whether it is a chemical experiment in a school chemistry lesson, a production process, or simply household needs. How much does 1 liter of water weigh? The answer to this question is not as simple as it might seem at first glance.

What determines the mass of water?

According to the laws of physics, there is a difference between weight and mass. If we talk about weight, then we mean the force of the impact of a body of a certain mass on the surface. And the term "mass" denotes a quantitative measure of the inertia of the body, which is measured in kilograms. In our article we are talking about the mass of water.

How much does a liter of water weigh? This indicator depends on:

• temperature
• atmospheric pressure
• water conditions (liquid, ice, snow)
• salinity of water (fresh, salty)
• types of hydrogen isotopes

So the weight of water depends on all the above factors, which together determine the value of this indicator.

How much does a liter of water weigh - a bit of history

At different times, the answer to this question was not the same. But the annual consumption of water in the world is extremely large! Therefore, it was necessary to make a general decision regarding the measurement of the mass of the liquid. So, in 1964, during the international conference on weights and measures, a unit was approved, denoting the volume of 1 dm 3 of water - a liter.

However, this unit means, rather, not weight, but volume. In this case, the weight can be completely different - for example, a liter of water will be much heavier than a liter of gasoline due to its greater density.

In 1901, the Third International Conference on Weights and Measures decided to designate a liter as the volume of 1 kg of water at a temperature of 3.98 ° C and an atmospheric pressure of 760 mm Hg. The main difference between the designation of a liter was that in 1901 this unit was considered the volume of a kilogram, and in 1964 - only the volume, while the weight of the substance could be different.

So in the period 1901-1964. the weight of a liter of water was equal to one kilogram, however, subject to the above indicators of temperature and atmospheric pressure. To maintain this equality, it is also necessary that the water be clean. After all, ordinary drinking water contains salts that have a different effect on its density. Is there a difference between swimming in a fresh lake and salt water? Of course, the latter is unlikely to drown. So in order for a liter of water to be equal to a kilogram, the liquid must be distilled, obtained by evaporation and condensation of steam.

How to determine how much one liter of water weighs?

To conduct such an experiment, we need a glass or plastic jar, measuring utensils, electronic scales and distilled water. First you need to determine the mass of the can with the help of scales and write down the resulting figure. Pour a liter of water into a measuring dish, pour into a jar and weigh again. Now you need to subtract the mass of the can - the result will be about one kilogram. Such scales can be used to determine the mass of other liquids, such as milk.

If you want to get a more accurate indicator, you must comply with the conditions of temperature (4˚С) and pressure (760 mm Hg). Then the mass of water will be 998.5 g.

Tap water, when weighed, will show slightly different results than distilled water. The fact is that impurities of heavy metals may be present in tap water, which increases the mass of one liter of water. Special formulas are also used to calculate the mass of 1 liter of water.

Now we know how much 1 liter of water weighs, what factors affect the weight of a liter of water and how to calculate the mass of water experimentally.

02.09.2017

How many liters in one kilogram of paint?

Quite often, when performing repair procedures, it becomes necessary to convert the volume of paint products into weight or vice versa. Often such information is used to convert the composition used to other volumes, for example, if the paint is in a container with a non-standard denomination or tank. But not many beginners in the building trade know how to convert kilograms to liters or vice versa. This article will consider how many liters of paint are contained in 1 kg, depending on the type of paint mixture.

Any volume can be converted to mass, provided that you know the specific gravity of 1 liter of solution. The question can be put in another way. So many buyers often ask how much is the weight of a liter can of paint. Finding such information on the Internet is not always easy, especially when it comes to non-standard containers, so quite often you have to do the calculations yourself.

A lot of factors can affect the weight of the mixture, including:

• share of products;
• solution density;
• additives that were added by the manufacturer during production.

That is why the mass of different types of paint and varnish products can vary quite a lot.

It must be taken into account that GOST data provide information only in measurements that have been approved by international standards, for example, kg / m3. But we need kg/l - which is 1000 times less than approved. In any case, the weight of paint and varnish products will depend on its variety.

How to calculate paint weight? Everything is simple. We take the density indicator indicated on the package, usually it varies between 1.2-1.6. To find out the displacement in 1 kilogram, you need to multiply the number of kilograms by the density. Consider an example of how much 1 liter of paint with a density of 1.5 kg / l weighs: 1 l * 1.5 kg / l \u003d 1.5 kg. Next, we calculate how many liters 1 kilogram of paint will take: 1 kg: 1.5 kg / l \u003d 0.667 liters.

- According to invoices - one hundred and ninety-four tons ... Wai, woe to me ...
- How much is missing?
The Oriental replied:
- Very little. Four tons is not enough.
Actually, ten.
At the most, sixteen tons are missing.
The brigadier shook his head.
- You're an artist, dad! Sixteen tons of glucose moved! When did you make it?
The guest explained:
- People come up at all stations. Our Soviet people. Give in, they say, dear Bala, some grapes. And I have a good heart. Take it, I say.
- Well, yes, - the brigadier nodded, - and you sell them sixteen tons of state property. And, as they say, by no means by bank transfer.
The Eastern man clutched his head again:
- I know that rysk! I know it's turma! Good heart - I can not refuse.
© S.Dovlatov "Grapes"

The kilogram has become lighter. Either someone bit off 50 micrograms from the standard - the weight of a fingerprint, or the rest of the colleagues-standards sharply gained weight. Meanwhile, the kilogram is the only SI unit that is defined using an object made by people.

So, the keepers of this very standard receive a lot of interesting offers like, "maybe we can cut it off, 10 grams, huh? Well, for a couple of thousand lyam oiro." Can you imagine what scale of world underweight can be arranged with the help of a standard?

And they will hang out the weight in the markets: Rate on September 14, 2007 1 kg = 950 grams. By the way, a liter, probably already, is also under threat ...

At the moment, the kilogram is the only SI unit that is defined using a human-made object - a platinum-iridium standard. All other units are now defined using fundamental physical properties and laws.

The standard was made in 1889 and has since been stored at the International Bureau of Weights and Measures under three sealed glass caps. It is an alloy of platinum and iridium 3.9 centimeters high and in diameter. Exact official copies of the international standard were also made, which are used as national standards of the kilogram. In total, more than 80 copies were created. Copies of the international standard are also stored in the Russian Federation, at the All-Russian Research Institute of Metrology. Mendeleev. Approximately once every 10 years, national standards are compared with international ones. These comparisons show that the accuracy of national standards is approximately 2 µg. Since they are stored under the same conditions, there is no reason to believe that the international standard is more accurate. For various reasons, in a hundred years the international standard loses 0.00000003 of its mass. However, by definition, the mass of an international standard is exactly equal to one kilogram. Therefore, any change in the actual mass of the standard leads to a change in the value of the kilogram.

To eliminate these inaccuracies, various options for redefining the kilogram based on fundamental physical laws are currently being considered. So, since 2003, an international group of researchers from 8 countries, including Germany, Australia, Italy and Japan, under the auspices of the German standards laboratory, has been working to redefine the kilogram as the mass of a certain number of silicon-28 isotope atoms. The second project, called "Electronic Kilogram", started in 2005 at the US National Institute of Standards and Technology (NIST). The head of this project, Richard Steiner, claims that he has been working on the creation of the "electronic kilogram" for more than ten years. Scientists led by Dr. Steiner have created a device that measures the power required to generate an electromagnetic field, with which one kilogram of mass can be lifted. With its help, scientists were able to determine the mass of one kilogram with an accuracy of 99.999995%.

In November 2007, an advisory group will meet in Paris to determine an alternative to the metal standard of the kilogram, as well as other measures: the kelvin, which serves as a unit for measuring temperature, and the mole, which expresses the amount of a substance. The benchmarks will be based on more accurate calculations and all states will have to accept these changes.

One of the contenders for the role of a new kilogram standard is a ball created from a crystal of the silicon-28 isotope - such a standard would include atoms of the same type and would have a fixed mass.

One of the favorite questions of both children and teachers at school, addressed to them, is how much does water weigh. And although it would seem that weighing a liquid substance is not a problem, unlike, for example, a gaseous one, the answer to this question is not so unambiguous.

How much does a liter of water weigh?

Most are sure they know how much does 1 liter of water weigh- one kilogram. But in fact, its weight depends on many different factors. First of all, it depends on what phase state we are talking about. And there are three types of water:

• liquid;
• solid (snow, frost, ice);
• gaseous (steam).

Intermediate states include clouds, fog, because they also consist of water droplets. And in all these states, water weighs differently. Its weight also differs depending on salinity.

How much does a liter of water weigh in grams, depending on the state

In its usual liquid state, a standard glass of water (250 ml) will pull 249 grams. A liter of water is really as close as possible to a kilogram - or rather, 998.2 grams. In 12 liters of water - 11.98 kg, and a cubic meter of water will show 998.2 kg on the scales.

Interesting fact: heated water weighs a little less than cold water. But what is paradoxical is that ice weighs much less than water. A glass of ice, in particular, will pull 229 grams, a liter - 917 grams, a bucket of 12 liters - 11 kg, a cubic meter of ice - 917 kg.

But the weight of snow is not so stable - it depends on the density, and on exactly where and when the light fell. A glass of snow can show on the scales from 12 to 113 grams, a liter - from 50 to 450 grams.

If you say how much does 1 liter of water weigh in kg taking into account salinity, a liter of sea water can reach one kilogram 24 grams (at a salinity level of 35 percent). And fresh water weighs the same as mentioned above - 998.2 grams.

Another factor that affects the weight of water is the type of hydrogen isotopes. On this basis, water is distinguished as “light” (ordinary, a liter of which weighs 998.2 grams), “heavy” (1104.2 grams), “super heavy” (1214.6 grams).

If you decide to conduct a practical experiment, then it is not a fact that you will receive the above indicators when weighing. After all, even the level of atmospheric pressure can affect the weight of water. True, the indicators will fluctuate slightly, but still the result will be different. It should also be taken into account that in different regions the water has a different chemical composition and contains different amounts of all kinds of impurities.

How much does a liter of water weigh? updated: February 21, 2016 by: Anna Volosovets