Question

Which of the following statement(s) is/are incorrect?

Statement-1: Reversible isothermal compression of an ideal gas represents the limiting minimum value of the work done (|w|) by the surrounding on the system.

Statement-2: In an irreversible process, the cyclic integral of work is not zero.

Statement-3: For thermodynamic changes in adiabatic process $T^{\left(\frac{C_{2x}}{R}\right)}$. P =constant

Statement-4: ${△S}_{system}$ is zero for reversible adiabatic expansion of an ideal gas.

• A. Statement 3
• B. Statement 1,2,3
• C. Statement 1,2,4
• D. All

Answer 1

Answer: (A)

Statement 3

1. true

$q=u-w$ ; where symbols have usual meanings

for isothermal process u=0.

2. true

irreversible processes do not have a curve. On a graph paper they are represented by two points i.e. their initial and final states.

Thus we do not have cyclic integral of work is the work done in taking the system in between the two states.

3.False

4.True