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Question
Assertion :The gas on subjecting to Joule-Thomson effect gets heated if its temperature is less than its inversion temperature. Reason: Heating effect has Joule-Thomson coefficient -ve.
Read the above assertion and reason and choose the correct option regarding it.
Assertion :The gas on subjecting to Joule-Thomson effect gets heated if its temperature is less than its inversion temperature. Reason: Heating effect has Joule-Thomson coefficient -ve.
Read the above assertion and reason and choose the correct option regarding it.
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Solution
The correct option is C Assertion is correct but Reason is incorrect
When a non-ideal gas suddenly expands from a high pressure to a low pressure there is often a temperature change. Officially, the ratio of T/P is known as the Joule-Thomson coefficient. Note that, this is far from a reversible effect. It is however an adiabatic effect, and in many applications adiabaticity results from the simple fact that the pressure change occurs too quickly for significant heat transfer to occur. For many gases at room temperature, the T/P ratio is positive. Thus, a pressure drop is accompanied by a temperature drop.
If T<Ti then cooling effect μ=+ve
If T>Ti then heating effect μ=−ve
When a non-ideal gas suddenly expands from a high pressure to a low pressure there is often a temperature change. Officially, the ratio of T/P is known as the Joule-Thomson coefficient. Note that, this is far from a reversible effect. It is however an adiabatic effect, and in many applications adiabaticity results from the simple fact that the pressure change occurs too quickly for significant heat transfer to occur. For many gases at room temperature, the T/P ratio is positive. Thus, a pressure drop is accompanied by a temperature drop.
If T<Ti then cooling effect μ=+ve
If T>Ti then heating effect μ=−ve
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