Does density of water change during boiling and/or melting?

Question

Why/ why not?

Is this right then:

- The density of substances decreases for the transition between solidà liquid, and liquidà Gas (exception to this rule is for water, where the solidà liquid transition causes the substance to contract instead of expand, hence increasing density)

Answer 1

yes as you heat or freeze the water expands or contracts

Answer 2

Density Of Boiling Water

Answer 3

Yes, it does. The density of a substance increases as it is cooled and decreases as it is heated. Therefore a substance has maximum density at its freezing point and minimum density at its boiling point (it also depends on the pressure applied). However in the case of water the maximum density is 4 degree centigrade (not 0 degree) because of the low density crystal structure of ice.

Answer 4

For the best answers, search on this site https://shorturl.im/awBaN

YES density is mass/volume and when a substance melts its volume changes since volume of a substance is different generally in its solid, liquid and gas phases and mass remains same so its density changes.but change in density and amount of change depends on the particular material.For example density of water decreases on melting and on boiling density of a material always decreases.

Answer 5

if you thought up this question than your mind to me is awesome!

think about this sometime...
another way to ask your question would be:

How does temperature effect the elastic (or bonding) properties of water? or

Does gravity effect the density of water?

Gravity is calculated from matters density. In other words... how close the molecules are together

if you put 1 pound of cold-water in a vacuum and then1 pound of hot -water in a vacuum and measured each of their volume than you would answer your question

you can see the density or elasticity of water in the length of the drip... it's gravity is 1 in a resting body of water at sea level.

Science has assigned Water as the base of all gravitational measurements for a Reason...
(they don't yet realize that reason is a spiritual one!)

whether your on Earth or the Space Station I believe the density of matter between 32 and 212 is negligible (that is unless you split the atom of course)

Answer 6

What kind of water are you talking about?

The reason i ask is that there are different kinds of water, tap water, distilled water, salt-water.

Salt water for example typically has a higher density and when you go to the beach you can float higher than you can in freshwater since it suspends you more. I would imagine that as the salt-water boils then the water evaporates and the salinity of the water increases since there is more salt left per less water so that may increase the density of the water.

In many textbooks the "ideal" condition is used so they may blow off entirely the difference in density between the kinds of water i mentioned above.

As the other person mentioned and i paraphrase here ....ice floats in liquid water.... so the density of water in the form of ice (solid) is different that the density of water in the form of liquid.

When water evaporates because of boiling this is water in the form of a vapor or steam which floats around in the air so it sounds like the answer to your question is YES the three states of water (liquid, solid, vapor) do have different densities.

this is just my common sense approach to it from a kitchen type point of view.

Answer 7

Water shows what we call anomalous behavior. It is called so because its density decreases on cooling between 4 to 0 degree Celsius. this happens because of crystal structure of ice in which each water molecule is at the tip of tetrahedron. this causes them to space out and thus density decreases as it is the mass per unit volume. though water shows normal behavior above 4 degree Celsius and below 0 degree Celsius.

Answer 8

It changes through out the process of adding/removing heat. The pressure that the fluid is subjected to will also determine the change. At higher pressures the change is smaller. I advise you to understand or read the kinetic theory of matter. Also read on Saturation properties of matter and phase changes.

First principles are very important in science. That seems to be your problem. Once your understand the fundamentals, everything falls in place. Good luck!

Answer 9

yes it does. all substances normally exapand on heating on contract on cooling. so obviously the density varies

Answer 10

yes it does.

boiling water is energised so that it moves much more freely and bounces around wildly, whereas frozen water is rigidly held together.