Physics Thermodynamics SZABMU 2023
PMDC Verified Question 21 of 54
The thermodynamics process during which the pressure is kept constant is called:
A
Isobaric process
B
Isochoric process
C
Adiabatic process
D
Isothermal process
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Isobaric process
1. Concept:

A thermodynamic process that involves changing state variables (V, T) while explicitly maintaining a constant pressure constraint is known as an isobaric process.

2. Formula:

$$P = \text{constant} \implies \Delta P = 0$$

3. Solution:

  • 'Iso' stands for equal/constant. 'Baric' refers to pressure (originating from 'baros' meaning weight, related to barometers).


  • When a gas expands but the external pressure (like a freely moving piston under constant atmospheric weight) doesn't change, the process is Isobaric.


4. Why other options are incorrect:

Isochoric means constant volume. Isothermal means constant temperature. Adiabatic means zero heat exchange.

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