When a fixed amount of ideal gas goes through an isothermal expansion,
A) its internal (thermal) energy does not change.
B) the gas does no work.
C) no heat enters or leaves the gas.
D) its temperature must decrease.
E) its pressure must increase.

Question

Quizplus · Accepted Answer

An isothermal process is one in which the temperature remains constant. Therefore, the internal (thermal) energy of the gas does not change during the expansion.

When a Fixed Amount of Ideal Gas Goes Through an Isothermal