Question

Two moles of an ideal gas at 1 bar pressure and 298 K is expanded into vacuum to double the volume. The work done is:

• A. \( 2 \, \text{J} \)
• B. \( 0 \, \text{J} \)
• C. \( 1.5 \, \text{J} \)
• D. \( 10 \, \text{J} \)

Hint:

In free expansion (expansion into vacuum), \( P_{\text{ext}}=0 \), so work done is always zero irrespective of volume change.

Answer 1

The Correct Option is B