Physics - Heat & Thermo Question with Solution | TestHub

By first law of thermodynamics - $$\begin{array}{rl}\mathrm{dQ}& =\mathrm{dV}+\mathrm{dW}\\ \mathrm{dV}& =0\text{ for isothermal process }\\ \mathrm{dQ}& =\mathrm{dW}\\ & =+150\end{array}$$ $\Rightarrow 150\mathrm{J}$ of heat has been added to the system. So, the correct answer is ' $150\mathrm{J}$ of heat has been added to the gas'.