How much pressure must be applied to maintain equilibrium between liquid and gaseous oxygen at its critical temperature?
a. 1 atm c. 43.9 atm
b. 37 atm d. 49.7 atm
ANS: D
When the atmospheric pressure is maintained at 49.7 atm, at a temperature of –119° C (oxygen's critical temperature), oxygen maintains an equal balance between its liquid and gaseous states.
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