We observe in our daily life that objects like wood always float in water and it depends on size of these types of objects. This gives the effects of mass and volume on density. A physical property of matter is density which is unique quantity for each element and compound. It is defined as the measurement of the heaviness of objects at a constant volume in qualitative manner; for example; a rock is heavier than a crumpled paper piece of the same size. Similar a ceramic cup is denser than styro-foam cup. This physical quantity also is referred as how closely packed material.

The less dense object than water is float on water like wood, ice floats on water due to its less density than water. Similar oil floats on the mixture of vinegar and water. It is mass per unit of volume and expressed as grams per mL or cc. Here we are discussing the density of water at different temperature and in different types of water like in salted water, sea water, pure water, water vapour.

The less dense object than water is float on water like wood, ice floats on water due to its less density than water. Similar oil floats on the mixture of vinegar and water. It is mass per unit of volume and expressed as grams per mL or cc. Here we are discussing the density of water at different temperature and in different types of water like in salted water, sea water, pure water, water vapour.

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We know that Density is given by:

So, if we divide the mass of the water by its volume of the bucket, up to which the water is filled. We get its density. Instead of doing so let us consider unit volume of space in which water is filled. If we again divide mass by its volume we get the same Density at same temperature.

Thus, Density of water is independent of volume but depends on temperature. The density can be expressed as**kg/m**^{3} or **gram per cubic meter**. We can also call the Density of Water as Mass Density of Water as mass is playing a major role here.

Thus, Density of water is independent of volume but depends on temperature. The density can be expressed as

Sl no |
Temperature in ^{0}C |
Density in Kg/m^{3} |

1 | 100 | 958.4 |

2 |
80 | 971.8 |

3 | 60 | 983.2 |

4 | 40 | 992.2 |

5 | 30 | 995.65 |

6 | 25 | 997.04 |

7 | 22 | 997.77 |

8 | 20 | 998.2 |

9 | 15 | 999.1 |

10 | 10 | 999.70 |

11 | 4 | 998.97 |

12 | 0 | 999.83 |

13 | -10 | 998.12 |

14 | -20 | 993.547 |

15 | -30 | 983.854 |

Let us collect equal amount of river water
and sea water. Now, find its density. We will find that the density of
river water is different from that of ocean at a constant temperature.
Why is it so?

We know that the density of water remains same at constant temperature. Still why the density is varying in both these waters?

We
know that sea water has salt content present in it. So, another
component to be considered is salt content in water. It is actually salt
that adds more mass to the water, which makes the water denser. It is
the only reason for which there is still ice floating in the oceans and
not all frozen up. The salt that is present actually lowers the
freezing point of water. It also affects the density of water. Water
with salt in it is basically denser than the normal freshwater. Hence,
it tends to sink down the ocean. We know that the density of water remains same at constant temperature. Still why the density is varying in both these waters?

The density of salt water may range from **1020 **to **1030** **kg/m**^{3} but it may vary with the amount of salt present in water and the temperature.

The Density of Salt Water may range from **1020 **to **1030 kg/m**^{3}
but it may vary with the amount of salt present in water and the
temperature. The dissolved salts actually add more to the mass of water
than its volume and hence are denser than the normal water.

As the amount of salt content will increase the freezing point of water would reduce eventually. The known density of surface sea water is from about**1020 to 1029 kg/m**^{3}.

If we go deep in sea, then the density of water changes to**1050 kg/m**^{3}.

The salt that is present actually lowers the freezing point of water. It also affects the Density of Water. Water with salt in it is basically denser than the normal freshwater. Hence, it tends to sink down the ocean.

As the amount of salt content will increase the freezing point of water would reduce eventually. The known density of surface sea water is from about

If we go deep in sea, then the density of water changes to

The salt that is present actually lowers the freezing point of water. It also affects the Density of Water. Water with salt in it is basically denser than the normal freshwater. Hence, it tends to sink down the ocean.

The weight of water divided by
per unit of its volume is called the density of water. Basically the
weight of water in the unit volume of it is the density of water. The
density of water is related to the temperature at which water is when
its density is measured.

The density of sea water lies between **1,020 to 1,029 kg/m**^{3}. If we go deep in sea then the density of water changes to **1050 kg/m**^{3}.

The Density of Water Vapor can be written as:

$\rho$ w = 0.0022 $\frac{P_{w}}{T}$

Here **P**_{w }is the Partial pressure water vapor. It is expressed in **N/m**^{2}.

The density of water is related to the temperature at which water is when its density is measured.

The density of liquid water is

The

The dissolved salts actually add more to the mass of water then its volume and hence are denser than the normal water. As the amount of salt content will increase, the freezing point of water would reduce eventually. The known density of surface sea water is from about

The Density of distilled water is same as that of pure water as it does not contain any impurities or salt content in it. The density of distilled water is

The Density of tap water is

Room temperature is considered to be $25^{\circ}$ c. The density of water at room temperature is equal to **997.77** **Kg/m**^{3}or **0.9970 g/cm**^{3}.

When the temperature is 4 degrees, then the density of water is considered to be maximum. The reason due to which ice floats on water is that ice is less dense as compared to water. The density can be expressed as**kg/m**^{3} or **g/m**^{3}.

When the temperature is 4 degrees, then the density of water is considered to be maximum. The reason due to which ice floats on water is that ice is less dense as compared to water. The density can be expressed as

We know that density varies with temperature. Hence every temperature has its own density.The Density of water at $20^{\circ}$ C is **1 gm per cubic centimeter or 1 gm per milliliter**. This is the rounded up or approximate value. The actual density is **0.9982071** **gm/cm**^{3}.

The temperature $25^{\circ}$ C is generally taken as standard room temperature even though room temperature varies from **20 - 30$^{\circ}$ C**. The Density of water at $25^{\circ}$ c is **0.998 gm**/**ml**.

In SI system, the units of Density of Water are kilograms per cubic meter. In CGS system they are expressed in gram per cubic centimeter. The density of water in **g/cm**^{3} is one.

The various densities at different temperature are expressed which represents the Density of Water Table as given below:

Sl no |
Temperature |
Density in gm/cm ^{3} |

1 | 100 | 0.9584 |

2 | 80 | 0.9718 |

3 | 60 | 0.9832 |

4 | 40 | 0.9922 |

5 | 30 | 0.9956 |

6 | 25 | 0.997 |

7 | 22 | 0.9978 |

8 | 20 | 0.9982 |

9 | 15 | 0.9991 |

10 | 10 | 0.9997 |

11 | 4 | 0.99997 |

12 | 0 | 0.9998 |

13 | -10 | 0.9981 |

14 | -20 | 0.9935 |

15 | -30 | 0.9838 |

We know that ice is a crystalline solid made of water. So, there lies a question, will both ice and water have the same density? If not which one is denser Water or Ice and why?

Ice is less dense than water

Gallon is defined as the weight of water. It is also called weight density. Here is the **Weight Density of Water** at different temperatures.

Temperature |
Density in lb/m ^{3} |
Density in lb/gallon |

32 | 62.41 |
8.344 |

40 | 62.43 |
8.345 |

50 | 62.41 | 8.343 |

60 | 62.37 | 8.338 |

70 | 62.31 | 8.329 |

80 | 62.22 | 8.318 |

90 | 62.12 | 8.304 |

100 | 62.00 | 8.288 |

110 | 61.86 | 8.27 |

120 | 61.76 | 8.25 |

130 | 61.55 | 8.228 |

140 | 61.38 | 8.205 |

150 | 61.19 | 8.18 |

160 | 60.99 | 8.154 |

170 | 60.79 | 8.126 |

180 | 60.57 | 8.097 |

190 | 60.34 | 8.067 |

200 | 60.11 | 8.035 |

220 | 59.61 | 7.969 |

240 | 59.08 | 7.898 |

260 | 58.52 | 7.823 |

280 | 57.92 | 7.743 |

300 | 57.31 | 7.661 |

350 | 55.59 | 7.431 |

400 | 53.65 | 7.172 |

450 | 51.47 | 6.88 |

500 | 48.95 | 6.543 |

550 | 45.96 | 6.143 |

600 | 42.3 | 5.665 |

650 | 37.4 | 4.999 |

700 | 27.3 | 3.651 |

We know that 1 feet = 0.3048 m. Thus, using this relation, we can find the **Density of Water in lb/ft**^{3} by converting meters in to feet.

The Specific weight per unit volume is called the **Specific density of water**. The specific density of water is **1 gm/m**^{3}. The difference is that the specific weight is used instead of mass. Rest the process of calculation is the same.

It is given by

Average density = $\frac{Average\ Mass}{Average\ Volume}$It is expressed in

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