An ideal monoatomic gas is confined in a horizontal cylinder by a spring loaded piston (as shown in the figure). Initially the gas is at temperature $\mathrm{T}_1$, pressure $\mathrm{P}_1$ and volume $\mathrm{V}_1$ and the spring is in its relaxed state. the gas is then heated very slowly to temperature $T_2$, pressure $P_2$ and volume $V_2$. During this process the piston moves out by a distance $x$. Ignoring the friction between the piston and the cylinder, the correct statement(s) is(are)
Select ALL correct options:
A
If $V_2=2 V_1$ and $T_2=3 T$, then the energy stored in the spring is $\frac{1}{4} P_1 V_1$
B
If $V_2=2 V_1$ and $T_2=3 T_1$, then the change in internal energy is $3 P_1 V_1$
C
If $V_2=3 V_1$ and $T_2=4 T_1$, then the work done by the gas is $\frac{7}{3} P_1 V_1$
D
If $V_2=3 V_1$ and $T_2=4 T_1$, then the heat supplied to the gas is $\frac{17}{6} P_1 V_1$
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