A certain gas mixture at 20°C and 0.12 MPa is composed of 30% CO2, 50% O2, and 20% N2 by mass. The mixture passes through a heat exchanger in steady fl ow leaving at 45°C and 0.1 MPa a. Find the heat...

A certain gas mixture at 20°C and 0.12 MPa is composed of 30% CO2, 50% O2, and 20% N2 by mass. The mixture passes through a heat exchanger in steady fl ow leaving at 45°C and 0.1 MPa

a. Find the heat interaction per kilogram of mixture.

 b. Find the change of entropy per kilogram of mixture.