HARDMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryThermodynamics and ThermochemistryAchiever Section
When 1 mol of an ideal gas is compressed to half of its volume, its temperature becomes double; then the change in entropy (S) would be:
A.CVln 2
B.CPln 2✓ Correct
C.CV R ln 2
D.(CV– R) ln 2 × CP
Explanation
The expression of entropy is given as 2 2 v 1 1 T V S 2.303C log 2.303R log T V we have 2 1 T 2T and 1 2 V 2V so, we get, V 2 1 S 2.303C log 2.303R log 1 2 or we can write it as V S C R ln 2 = CPln 2 Thus, the correct option is (b)
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