A gas follows the rectangular cycle 1→2→3→4→1 described: • 1→2: constant pressure…

PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

A gas follows the rectangular cycle 1→2→3→4→1 described: • 1→2: constant pressure

100\,\text{kPa}

expansion from

0.020\,\text{m}^3

0.060\,\text{m}^3

. • 2→3: constant volume

0.060\,\text{m}^3

while pressure rises to

300\,\text{kPa}

. • 3→4: constant pressure

300\,\text{kPa}

compression back to

0.020\,\text{m}^3

. • 4→1: constant volume

0.020\,\text{m}^3

while pressure falls to

100\,\text{kPa}

. What is the magnitude of the net work done BY the gas during one complete cycle? (a)

12\,\text{kJ}

(b)

0\,\text{kJ}

(c)

8.0\,\text{kJ}

(d)

4.0\,\text{kJ}