An Ideal Gas Mixture Consists of 35% Helium and 65

Multiple Choice

An ideal gas mixture consists of 35% helium and 65% argon gases by mass. The mixture is now expanded isentropically in a turbine from 400°C and 1.2 MPa to a pressure of 150 kPa. The mixture temperature at turbine exit is

A) 174°C
B) 20°C
C) 99°C
D) 148°C
E) 256°C