An ideal gas in a thermally insulated vessel at internal pressure $P_1$,volume $V_1$,and absolute temperature $T_1$ expands irreversibly as shown in the following diagram. The final pressure,volume,and absolute temperature of the gas are $P_2$,$V_2$,and $T_2$ respectively. Which is the correct statement for the expansion?
- A$q > 0$
- B$T_1 V_1^{\gamma - 1} = T_2 V_2^{\gamma - 1}$
- C$T_1 = T_2$
- DNone of these
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