Heat & Thermodynamics MCQs with Answers

One-liner

The freezing point of water is the same as its melting point (0°C or 32°F at standard pressure).

One-liner

The internal energy of a system is the energy of the atoms of the system, comprising the total kinetic and potential energies of all its constituent particles.

One-liner

Charles's Law states that the volume of a gas is directly proportional to its absolute temperature at constant pressure, so the relationship is between Volume and Temperature.

One-liner

Heat has the same units as Work because both are forms of energy and are measured in joules (J) in the SI system.

One-liner

Liquid can be converted into solid by cooling (also called freezing or solidification).

One-liner

Liquid molecules leave the surface during evaporation because their energy is high enough to overcome the intermolecular forces of attraction.

One-liner

The ideal gas equation is PV = nRT, where P is pressure, V is volume, n is number of moles, R is the universal gas constant, and T is temperature.

One-liner

Boyle's law states that at constant temperature, the pressure of a given mass of gas is inversely proportional to volume.

One-liner

In an adiabatic process, when the volume of a gas decreases, its temperature increases because work done on the gas raises its internal energy without any heat exchange.

One-liner

A fusion reaction is initiated by high temperature, which provides the energy needed to overcome electrostatic repulsion between atomic nuclei.