Answer to Question #152444 in Molecular Physics | Thermodynamics for Aditya

Question

Consider an isolated system that contains two pieces of copper sepa-
rated by an (internal) insulating wall. Initially, the first piece is at 500K
and the second is at 300K. Calculate the entropy change in the sys-
tem when the insulating wall is removed; assume that each piece has
half a mole of copper in it. Given: Specific heat capacity of Cu is
CP = 22.6JK−1mol−1
. [Hint: S is an extensive state function].
(b) What is the entropy change of the universe ? Comment whether the
process is reversible/irreversible ?
(c) Repeat your calculations for a molar heat capacity which is a function
of T: CP = 22.6 + 6.28e − 03 T Jmol−1 K−1
. How does the equilibrium T
change for such a CP ? Can you justify it ?

Answer 1

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