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Answer the following questions based on the P-T phase diagram of carbon dioxide:
What are the critical temperature and pressure for `CO_(2)`? What is their significance ?

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The critical temperature and pressure of `CO_(2) " are " 31.1 ^(@) C " and " 73.0 ` atm, respectively. Above this temperature, `CO_(2)` will not liquefy even if compressed to high pressures.
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