A Piston-Cylinder Device Contains an Ideal Gas Mixture of 3

Multiple Choice

A piston-cylinder device contains an ideal gas mixture of 3 kmol of He gas and 7 kmol of Ar gas at 35°C and 420 kPa. Now the gas expands at constant pressure until its volume doubles. The amount of heat transfer to the gas mixture is

A) 5.9 MJ
B) 7.3 MJ
C) 38 MJ
D) 257 MJ
E) 64 MJ