Question

3.3.2 lab: How does Temperature affect Water Density?

Answer 1

Heating a substance causes molecules to speed up and spread slightly further apart, occupying a larger volume that results in a decrease in density. Hot water is less dense and will float on room-temperature water. Cold water is more dense and will sink in room-temperature water.

Answer 2

Quite Stable

Step-by-step explanation:

The density of liquid water is very stable and varies little with changes in temperature and pressure .

At the normalized pressure of 101 325 Pa (1 atmosphere), the liquid water has a maximum density 999,974 9 kg · m-3 at 3,983 035 ° C. When climbing the temperature decreases the density (by For example, at 20 ° C it has 998,206 7 kg · m-3 and at 40 ° C reaches a density of 992,215 2 kgm-3.

The temperature of 3,983 035 ° C represents a turning point and is when it reaches its maximum density (at the mentioned pressure). From that point, when the temperature drops, the density begins to decrease, although very slowly (almost nothing in practice), until at 0 ° C it decreases until 999,842 8 kgm-3.