Question

The work done in ergs for the reversible expansion of one mole of an ideal gas from a volume of 10 litres to 20 litres at 25°C is

(1) – 2.303 × 298 × 0.082 log2

(2) – 298 × 10⁷ × 8.31 × 2.3031 log2

(3) – 2.303 × 298 × 0.082 log0.5

(4) – 8.31 × 10⁷ × 298 × 2.303 log0.5

Answer 1

Correct Answer is: (2) – 298 × 10⁷ × 8.31 × 2.3031 log2

W = – 2.303 nRT log V₂/V₁

= – 2.303 × 1 × 8.314 × 10⁷ × 298 log 20/10

= – 298 × 10⁷ × 8.314 × 2.303 log 2.