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Two solid blocks, each having mass m and specific heat c,
Chapter 7, Problem 7.6(choose chapter or problem)
Two solid blocks, each having mass m and specific heat c, and initially at temperatures \(T_{1}\) and \(T_{2}\), respectively, are brought into contact, insulated on their outer surfaces, and allowed to come into thermal equilibrium.
(a) Derive an expression for the exergy destruction in terms of m, c, \(T_{1}\), \(T_{2}\), and the temperature of the environment, \(T_{0}\).
(b) Demonstrate that the exergy destruction cannot be negative.
(c) What is the source of exergy destruction in this case?
Questions & Answers
QUESTION:
Two solid blocks, each having mass m and specific heat c, and initially at temperatures \(T_{1}\) and \(T_{2}\), respectively, are brought into contact, insulated on their outer surfaces, and allowed to come into thermal equilibrium.
(a) Derive an expression for the exergy destruction in terms of m, c, \(T_{1}\), \(T_{2}\), and the temperature of the environment, \(T_{0}\).
(b) Demonstrate that the exergy destruction cannot be negative.
(c) What is the source of exergy destruction in this case?
ANSWER:Step 1 of 7
Following things we need to determine
a) show an expression for exergy destruction,
b) Show that the destroyed exergy cannot be negative
c) what causes exergy destruction.