A mole of an ideal diatomic gas undergoes a transition from $A$ to $B$ along a path $AB$ as shown in the figure, The change in internal energy of the gas during the transition is ...... $kJ$
A$10$
B$-10$
C$5$
D$-5$
Medium
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A$10$
a $\Delta \mathrm{U}=\frac{\mathrm{f}}{2} \mu \mathrm{R}(\Delta \mathrm{T})=\frac{\mathrm{f}}{2}\left(\mu \mathrm{R} \mathrm{T}_{2}-\mu \mathrm{R} \mathrm{T}_{1}\right)$
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