Two litres of an ideal gas at a pressure of 10 atm expands isothermally into a vaccum until final volume is of 10 litres conducted reversibly. How much heat is absorbed ?

Explanation

`dq = -w = 2.303 nRT log V_2/V_1`
=`2.303xxPV log (10)/2`
=`2.303 xx 10 xx 2 xx log 5`
= 32.2 lit. atm