A gas occupies 2L at S.T.P. It is provided with 300 Joule of heat so that its volume becomes 2.5 litre at a pressure of 1 atm. The value of ΔU (Change in internal energy) of process is :-
(1) 350.5 Joule
(2) 249.5 Joule
(3) 150.35 Joule
(4) None of these