Consider the following two statements. A. If heat is added to a system, its temperature must increase. B. If positive work in done by a system in a thermodynamic process, its volume must increase.

Question

Philoid · Accepted Answer

Statement A: For an isothermal process (where the temperature remains constant) if heat is added to a system temperature will not increases. So, statement A is wrong.

Statement B: We know that,

Work done = force ×displacement

Volume = area ×displacement

Therefore,

Work done=pressure ×volume

Let change in the volume of system = ΔV = V₂-V₁

Pressure =P

Thus, work done by the system W at constant pressure

W=PΔV

W>0 and positive only when V₂ > V₁.

Therefore, statement B is correct.

Consider the following two statements.A. If heat is added to a system, its temperature must increase.B. If positive work in done by a system in a thermodynamic process, its volume must increase.

Consider the following two statements.
A. If heat is added to a system, its temperature must increase.

B. If positive work in done by a system in a thermodynamic process, its volume must increase.