Question

Consider the following two statements.
(A) If heat is added to a system, its temperature must increase.
(B) If positive work is done by a system in a thermodynamic process, its volume must increase.
(a) Both A and B are correct.
(b) A is correct but B is wrong.
(c) B is correct but A is wrong.
(d) Both A and B are wrong.

Answer 1

(c) B is correct but A is wrong.

If heat is added to a system in an isothermal process, then there'll be no change in the temperature.

$$\begin{gathered} \mathrm{Work}\mathrm{done}\mathrm{by}\mathrm{a}\mathrm{system},∆W=P∆V \\ \Rightarrow ∆W=\mathrm{positive}\Rightarrow ∆V=\mathrm{positive} \end{gathered}$$

Here,
P = Pressure
$∆$V = change in volume