First Law of Thermodynamics Quiz

The total entropy of an isolated system can never decrease over time.

Energy always flows from a colder body to a hotter body.

The internal energy of an isolated system remains constant.

Energy cannot be created or destroyed, only transformed from one form to another. (correct)

The energy content of an open system remains constant.

Heat added to a system increases its internal energy. (correct)

Work done by a system decreases its internal energy.

The total energy of a closed system decreases over time.

Energy spontaneously tends to disperse and become more chaotic.

The change in internal energy of a system is equal to the heat added minus the work done by the system. (correct)

The temperature of an ideal gas is directly proportional to its pressure.

The efficiency of a heat engine can never be 100%.