4.(12pts, 10min) Do any 6 of (a),(b), (c), (d), (e), (f), (g), (h) Very brief an

Question

4.(12pts, 10min) Do any 6 of (a),(b), (c), (d), (e), (f), (g), (h) Very brief answers! Don't Ramble!!! (a) Why was enthalpy introduced? What is its significance? (b) What is the meaning of W in the equation S k InW (c) List the three necessary conditions for true Thermodynamic Equilibrium. (d) How do exact and inexact differentials differ? (e) What are the key characteristics of a reversible process and an irreversible process? (0) What is a heat reservoir and what are its main characteristics? (g) Why was AG introduced? (h) What is the value of the change in a state function for a cyclic process? Why?

Explanation / Answer

heat reservoir is a body whose mass is infinity that can either acts as a source or sink of heat. since there is no temperarture change across the heat reservoir , the heat exchange is reversible.

entropy change = dQ/T, dQ= heat rejected or accepted

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