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