Question

Air is expanded from 50 litres to 150 litres at 2 atmospheric pressure. The external work done is

(Given, 1 atm = 105 N m–2)

• A. 2 × 10–8 J
• B. 2 × 104 J
• C. 200 J
• D. 2000 J

Answer 1

Answer: (B)

2 × 104 J

Answer 2

: Work done, $W = P\Delta V$

}{= 2 \times 10^{4}J}$$