Ideal gas heating

The above shows a resistor with resistance RR installed in a cylinder filled with a fixed quantity of ideal gas. We connect the resistor to a power supply with a voltage of VV to provide heating energy in the cylinder. Suppose the pressure and volume of the ideal gas before and after heating are (P0,V0)(P_0, V_0) and (P0,1.5V0),(P_0, 1.5V_0), respectively. If the internal energy of the ideal gas before heating is U0,U_0, then what is the change in the amount of the internal energy ΔU\Delta U after heating? (The cylinder is sealed completely.)

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