In a free expansion (or Joule expansion) of a gas, no work is done either on or by the gas system. If the gas in such a process behaves as an ideal gas, which of the following statements is also true for the free-expansion process?Note: In the answer options below, U denotes the internal energy of the gas, S denotes the entropy of the gas, q denotes the heat exchanged between the gas and its surroundings, Vinitial denotes the initial volume of the gas (before expansion), and Vfinal denotes the final volume of the gas (after expansion).

MCQs on thermodynamics in classical mechanics systems. Topics include the first, second, and third laws of thermodynamics, energy, work, enthalpy, and entropy, spontaneity, chemical potential, equilibrium, phase changes, and chemical kinetics.