Chemical Engineering Thermodynamics
Which one is true for a throttling process?

A gas may have more than one inversion temperatures
The inversion temperature is different for different gases
The inversion temperature is the temperature at which Joule-Thomson co-efficient is infinity
The inversion temperature is same for all gases

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Chemical Engineering Thermodynamics
The third law of thermodynamics states that the

Heat transfer from low temperature to high temperature source is not possible without external work
None of these
Gases having same reduced properties behave similarly
Heat capacity of a crystalline solid is zero at absolute zero temperature

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Chemical Engineering Thermodynamics
Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which

A homogeneous solution (say of phenol water) is formed
Mutual solubility of the two liquids shows a decreasing trend
Two liquids are completely separated into two layers
None of these

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