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

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

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Chemical Engineering Thermodynamics
Choose the condition that must be specified in order to liquify CO₂ (triple point for CO₂ is - 57°C and 5.2 atm).

Temperature must be kept above - 57°C
Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C
Pressure and temperature must be kept below 5.2 atm. and - 57°C respectively
Pressure must be kept below 5.2 atm

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