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Q. 11.21 Answer the following questions based on the P-T phase diagram of carbon dioxide:

(c) What are the critical temperature and pressure for  CO_{2} ? What is their significance ?

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The critical temperature and pressure for CO2 are 31.1 oC and 73.0 atm respectively. If the temperature exceeds this critical value of temperature CO2 would not liquefy no matter how high the pressure is.

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