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One mole of a diatomic ideal gas undergo...

One mole of a diatomic ideal gas undergoes a cyclic process ABC as shown in figure. The process BC is adiabatic. The temperature at A,B and C are 400K, 800K and 600K respectively. Choose the correct statement:

A

The change in internal energy in the process AB is

B

The change in internal energy in the process BC is

C

The change in internal energy in whole cyclic process is 250 R

D

The change in internal energy in the process CA is 700 R

Text Solution

Verified by Experts

The correct Answer is:
B
`triangleU_(AB)=nC_(v)(T_B-T_A)=1xx(5R)/(2)(800-400)=1000R`
`triangleU_(BC)=nC_(v)(T_C-T_B)=1xx(5R)/(2)(600-800)=-500R`
`triangleU_(" total ")=0`
`triangleU_(CA)=nC_(v)(T_A-T_C)=1xx(5R)/(2)(400-600)=-500R`.
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