Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is
0
∞
+ve
-ve
Correct Answer :
A. 0
Related Questions
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Not liquify (barring exceptions)
Immediately liquify
Never liquify however high the pressure may be
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Hess's
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Lavoisier and Laplace
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Only A decreases
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Both F and A increase
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Always greater than one
Same at the same reduced temperature
Same at the same reduced pressure
Both (B) & (C)
Third law of thermodynamics is helpful in
Prediction of the extent of a chemical reaction
Calculating absolute entropies of substances at different temperature
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Oxygen
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Air
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Kinematic viscosity
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Triple
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Polytropic
Isentropic
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0
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y = 1.44
1.66
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Increases
Decreases
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Zero
Positive
Negative
None of these
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PV
2PV
PV/2
0
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Ice at the base contains impurities which lowers its melting point
Due to the high pressure at the base, its melting point reduces
The iceberg remains in a warmer condition at the base
All (A), (B) and (C)
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Liquid extraction
Drying
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Pick out the wrong statement.
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Thermal efficiency of a Carnot engine is always less than 1
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More
Less
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μ° + RT ln f
μ°+ R ln f
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Increase
Decrease
No change
None of these
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270
327
300
540
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Adiabatic
Reversible
Isothermal
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Work done
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Stirling
Brayton
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0
< 0
< 1
> 1
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Entropy
Temperature
Enthalpy
Pressure