A gas in a closed container undergoes two successive steps

PHYSICS · Subjective · CBSE · Physics · Thermodynamics · Thermodynamics

Problem

A gas in a closed container undergoes two successive steps. First,

150\,\mathrm{J}

of heat is supplied while the volume remains constant. Next, the gas does

80\,\mathrm{J}

of work on its surroundings while an additional

40\,\mathrm{J}

of heat is added. Calculate the net change in internal energy for the entire two-step process.