This problem asks for the change in entropy along various pathways. Use heat capacities from the end flap or quick reference pages of the Elliott and Lira textbook, assuming they are independent of T.

(a) Gaseous sulfur dioxide is heated isobarically at 0.4 MPa from 275 K to 490 K. What is the change in entropy (J/mol-K)?

(b) Gaseous sulfur dioxide is compressed isothermally at 490 K from 0.4 MPa to 5 MPa. What is the change in entropy (J/mol-K)?

(c) Gaseous sulfur dioxide undergoes an isothermal (T = 338 K) volume change from 95 L/mol to 45 L/mol. What is the change in entropy (J/mol-K)?

(d) Gaseous sulfur dioxide undergoes a state change from T1 = 338 K and P1 = 1 MPa to T2 = 287 K and P2 = 0.08 Mpa? What is the change in entropy (J/mol-K)?