JEE MainPhysicsHeat and ThermodynamicsNumerical+4 / −1
An ideal gas initially at temperature, is compressed suddenly to one fourth of its volume. If the ratio of specific heat at constant pressure to that at constant volume is , the change in temperature due to the thermodynamic process is K.
Numerical answer
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Correct answer: 273
- Given data
- Initial temperature:
- Final volume: gas is compressed to one fourth of initial volume
- Ratio of specific heats:
Because the gas is compressed suddenly, the process is taken as adiabatic.
- Use adiabatic relation
For an ideal gas in an adiabatic process,
So,
Hence,
Substitute and :
Therefore,
- Find change in temperature
- Final answer
The change in temperature is:
- Comparison with stored answer
Stored correct answer:
Our derived answer is also , so they agree.
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