Question

Heating a liquid expands it because

• A. Molecules gain potential energy and due to it, motion of molecules is increased
• B. Molecules gain kinetic energy and due to it, motion of molecules is increased
• C. Molecules gain kinetic energy and due to it, motion of molecules is reduced
• D. Molecules gain potential energy and due to it, motion of molecules is reduced

Answer 1

Answer: (B)

Molecules gain kinetic energy and due to it, motion of molecules is increased

As a liquid is heated, its molecules gain kinetic energy, motion of molecules is increased and the liquid expands.Overall interparticle distance increases.