Physics Thermodynamics NUMS 2020
PMDC Verified Question 48 of 54
The rapid escape of air from a burst tyre is an example of:
A
Isobaric
B
Isochoric
C
Adiabatic
D
Isothermal
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Adiabatic
1. Concept:

Thermodynamic processes that happen extremely fast do not leave enough time for heat to exchange with the surrounding environment.

2. Formula:

$$Q = 0 \implies W = -\Delta U$$

3. Solution:

  • When a tire bursts, the high-pressure air expands rapidly into the atmosphere.


  • Because the expansion is highly sudden, there is practically zero time for heat to flow into or out of the gas (\(Q = 0\)).


  • Any process where heat exchange is zero is strictly defined as an adiabatic process.


4. Why other options are incorrect:

Isothermal processes must happen very slowly to allow heat exchange. Isochoric processes require a constant volume. Isobaric requires constant pressure.

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