A cylinder contains 24.0 moles of an ideal gas at a temperature
of 300 K. The gas is compressed at constant pressure until the
final volume equals 0.63 times the initial volume. The molar heat
capacity at constant volume of the gas is 24.0 J/mol ∙ K and the
ideal gas constant is R = 8.314 J/mol ∙ K. The change in
the internal (thermal) energy of the gas is closest to
A) -64 kJ.
B) -86 kJ.
C) 64 kJ.
D) 86 kJ.
E) -22 kJ.
Answer: A