Consider the following processes: The temperature of two identical gases is increased from the same initial temperature to the same final temperature. Reversible processes are used. For gas A the process is carried out at constant volume while for gas B it is carried out at constant pressure. The change in entropy: a. Is the same for A and B b. Is greater for A c. Is greater for B d. Is greater for A only if the initial temperature is low

trokusr

trokusr

Answered question

2022-08-14

Consider the following processes: The temperature of two identical gases is increased from the same initial temperature to the same final temperature. Reversible processes are used. For gas A the process is carried out at constant volume while for gas B it is carried out at constant pressure. The change in entropy:
a. Is the same for A and B
b. Is greater for A
c. Is greater for B
d. Is greater for A only if the initial temperature is low

Answer & Explanation

ambivalentnoe1

ambivalentnoe1

Beginner2022-08-15Added 20 answers

At constant volume
S a = C v ln ( T 2 T 1 )
at constant pressure
S B = C p ln ( T 2 T 1 )
since C p > C v
S B > S A
the change in entropy (c) is greater for B.

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