As a pure substance goes through a constant pressure phase change from a liquid

Question

As a pure substance goes through a constant pressure phase change from a liquid to a gas, what is always true Specific volume increases Specific volume stays the same Temperature increases Temperature stays the same Carbon dioxide within a tank is heated from a given state. You are interested in how much the temperature and pressure of the carbon dioxide in the tank is changing. Would it make more sense to model this system as an open or closed system? Open Closed Which of the following are pure substances? Liquid nitrogen, used in cryogenics Snow Methane gas, CH_4 Milk

Explanation / Answer

1.Temperature always remains same as it is phase change latent heat of vapourisation takes place

2. Closed system..(then only we can measure)

3.snow is best example for pure substances

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