Thermodynamics Question 311

Question: Three moles of an ideal monoatomic gas perform a cycle . The gas temperatures in different states are T1=200K,T2=400K,T3=1600K and T4=800K. The work done by the gas during the cycle is (Take R=25/3J/mol-K )

Options:

A) 5 kJ

B) 25 kJ

C) 15 kJ

D) 20 kJ

Show Answer

Answer:

Correct Answer: C

Solution:

(c) Process l2 and Process 34 are isochoric processes.

W12=0,W34=0,W23=nR(T3T2)

=3R(1600400)

W41=nR(T1T4)=3R(200800)=1800R

W=(36001800)R=1800R=15kJ



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