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).

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

ANSWER DOWNLOAD EXAMIANS APP

Chemical Engineering Thermodynamics
Law of corresponding states says that

The surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at the critical temperature
No gas can be liquified above the critical temperature, howsoever high the pressure may be
, two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same
The molar heat of energy of gas at constant volume should be nearly constant (about 3 calories)

ANSWER DOWNLOAD EXAMIANS APP