Question

What is the concept of density? Is density of water at 25c the same as that at 45c?

Answer 1

Look liquids are incompressible,that means their volume doesn't change which lead to no change in density as (density = mass/volume) so as volume don't change so as density .So density of liquids remains same at all temperature except their boiling temperature bcoz at boiling temperature they'll probably become vapor.

In gases density= PM/RT so density is inversely proportional to temperature.so change in temperature will affect density of gases but no density of liquids.

Conclusion: density of liquids remains constant while density of gases change with temperature.

I hope it cleared your query.

Have a nice day.