Subject: Thermodynamics

Question 1 Consider a mass of air, m = 10 kg cooled isochorically from P1 =1 MPa, T1 = 500 K to the temperature of the surroundings, T2 = 300 K as shows in Figure 1. Determine the entropy change of the air, the surroundings, and the universe. state 1 state 2 T 300 K T _=300K ST Figure 1. [40 marks]