A) \[\frac{5}{7}\]
B) \[-\frac{5}{7}\]
C) \[\frac{9}{7}\]
D) \[-\frac{9}{7}\]
Correct Answer: C
Solution :
[c] \[C=\frac{R}{\gamma -1}+\frac{R}{1-n}\]for a polytropic process \[\Rightarrow C=\frac{5R}{2}+\frac{R}{1-n}\text{ }\left( \therefore r=\frac{7}{5}\text{ for a doatomic gas} \right)\] For C to be negative, the possible value of 9 n will be \[\frac{9}{7}.\]You need to login to perform this action.
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