For a system undergoing an isothermal expansion,the work done on the working fluid is:
A) May be either,depending on the temperature
B) Positive
C) Zero
D) Negative

Question

Quizplus · Accepted Answer

For an isothermal expansion, the temperature of the system remains constant. As the gas expands, the pressure decreases and the volume increases. Work done on the gas is given by the equation W = -P∆V, where P is the pressure and ∆V is the change in volume. Since the pressure is decreasing, the work done on the gas is negative. Hence, the answer is option D.

For a System Undergoing an Isothermal Expansion,the Work Done on the Working