An ideal gas in a thermally insulated vessel at internal pressure = `P_(4)`, volume =`V_(1)` and absolute temperature =`T_(1)` expands irreversibly against zero external pressure, as shown in the diagram. The final internal pressure, volume and absolute temperature of the gas are `P_(2), V_(2) and T_(2)`, respectively. For this expansion.

Options

A. q=0
B. `T_(2)= T_(1)`
C. `P_(2)V_(2)= P_(1)V_(1)`
D. `P_(2)V_(2)^(gamma) = P_(1)V_(1)^(gamma)`

Answer

A, B, C