A certain mass of a gas is expended from [2 L, 20 atm, 300 K] to [5 L, 10 atm, 320 K] against a constant external pressure of 5 atm. If heat capacity of the gas is `100J//^(@)C` then enthalapy change of the process will be : [1 atm lit. = 100 J]
A. 2 kJ
B. 0.5 kJ
C. 1.5 kJ
D. 1 kJ
