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A scientist fills a cylinder with the vapor phase of a substance in an equilibrium state. She increases the pressure with a moveable piston, while keeping the temperature constant. If vapor condenses during this process, how does the fixed temperature relate to the substances critical temperature and to its triple point temperature? Enter your response
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Answer #1

As the vapour condenses to liquid at constant temperature ,the temperature of the vapour must be below its critical temperature.

For the vapour to condense to liquid this temperature must be greater or equal to triple point temperature of the material concerned .

So the said temperature should lie between triple point and critical point with triple point included.

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