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Solution


Q.

2 moles of an ideal gas at 27°C expands isothermally and reversibly from a volume of 4 litres to 40 litres. The work done (in KJ) by the gas is
1 w=−28.72 kJ  
2 w=−11.488 kJ  
3 w=−5.736 kJ  
4 w=−4.968 kJ  

Ans.

(2)

w=-nRT·2.303logV2V1