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).

  • A. Pressure must be kept below 5.2 atm
  • B. Temperature must be kept above – 57°C
  • C. Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C
  • D. Pressure and temperature must be kept below 5.2 atm. and – 57°C respectively
Answer: Option D.
Explanation: 

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