A cylinder with fixed capacity of 67.2 lit contains helium gas at STP. The amount of heat needed to raise the temperature of the gas by 20°C is :
[Given that R = 8.31 J mol–1 K–1 ]
(1) 748 J (2) 350 J (3) 374 J (4) 700 J
Correct option (1) 748 J
Explanation:
Q = nCvdT
= 748 Joule
