Question

Critical temperature of ammonia and carbon dioxide are 304.1k and 405.5k which of these will liquify first. When you start cooling from 500k to their critical temperature

Answer 1

But for Carbon dioxide, the temperature has to be further bring down to 304.10 K to liquify it as above this Temperature it cannot be liquified. Answer: Carbon dioxide gas liquifies first rather than ammonia. because Carbon is liquifies first rather than nitrogen.

Answer 2

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• Ammonia will liquify first because its critical temperature will be reached first.
• Liquefication of ${CO2}$will require more cooling.