Question

When water is heated from 0C to 10C. Its volume:

(a) increases

(b) decreases

(c) does not change

(d) first decreases and then increases

Answer 1

(d) Initially at start of heating from 0°C to 4°C there will be a contraction as a result of which volume decreases. On further heating beyond 4°C to 10°C the molecules gain kinetic energy and start moving more randomly. Thus, intermolecular distance increases as a result of which its volume increases.