Question

A gas expands under constant pressure P from volume $V_{1}$to$V_{2}$. The work done by the gas is

• A. $P(V_{2} - V_{1})$
• B. $P(V_{1} - V_{2})$
• C. $P(V_{1}^{\gamma} - V_{2}^{\gamma})$
• D. $P\frac{V_{1}V_{2}}{V_{2} - V_{1}}$

Answer 1

Answer: (A)

$P(V_{2} - V_{1})$

Answer 2

Pressure is reduced, so the temperature falls.