Question 643: Thermodynamics & KTG

Question

In the thermodynamic processes, which of the following statements is NOT true?

Accepted Answer

We are asked which statement is
NOT true
among the four given:
Option A:
"In an isothermal process, the temperature remains constant."
Ã¢ÂÂ True. By definition,
isothermal
means constant temperature.
Option B:
"In an adiabatic process, the system is insulated from surroundings."
Ã¢ÂÂ True. In an adiabatic process, no heat transfer occurs, which can be achieved by insulation.
Option C:
"In an isochoric process, pressure remains constant."
Ã¢ÂÂ This is
not true
.
In an
isochoric
process,
volume
remains constant (not pressure). Pressure may change as temperature or other conditions change.
Option D:
"In an adiabatic process, $ P V^\gamma = 	ext{constant} $."
Ã¢ÂÂ True, for a reversible adiabatic process in an ideal gas.
Ã¢ÂÂ
Correct Answer: Option C

Answer

In an isothermal process, the temperature remains constant.

Answer

In an adiabatic process, the system is insulated from surroundings.

Answer

In an isochoric process, pressure remains constant.

Answer

In an adiabatic process, $\mathrm{PV}^\gamma=$ constant.

Thermodynamics & KTG

In the thermodynamic processes, which of the following statements is NOT true?

Choose the correct answer: