Water Phase Diagram: Is Vapour-Ice Coexistence at 0K, 0Pa?

Thread starter paweld
Start date Feb 3, 2011
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Diagram Phase Phase diagram Water

In summary, a water phase diagram is a graph that shows how temperature, pressure, and the physical state of water are related. It tells us about the conditions where water can exist as a solid, liquid, or gas. Vapour-ice coexistence refers to the simultaneous existence of water vapour and ice, indicating that water is at its melting point. At extreme conditions of 0 Kelvin and 0 Pascals, water can only exist as a solid. The water phase diagram also provides information about the properties of water and is important in understanding its behavior and predicting it in different environments.

Feb 3, 2011

paweld

Is it true that the line of coexistence of water vapour and ice starts from
the point p=0, T=0?

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Feb 3, 2011

timthereaper

According to my chart, for a saturated ice-water vapor mix, the point is like T=0.01 degC and P=0.61169 KPa.

Feb 3, 2011

paweld

thanks

1. What is a water phase diagram?

A water phase diagram is a graph that shows the relationship between temperature, pressure, and the physical state of water (solid, liquid, or gas). It illustrates the conditions under which water can exist in each phase.

2. What does the term "vapour-ice coexistence" mean?

Vapour-ice coexistence refers to the simultaneous existence of water vapour and ice at a particular temperature and pressure. This indicates that the water is at its melting point, where both solid and gas phases can exist in equilibrium.

3. Is it possible for water to exist in both the vapour and ice phases at 0 Kelvin and 0 Pascals?

No, it is not possible for water to exist in both phases at 0 Kelvin (absolute zero) and 0 Pascals (vacuum). At these extreme conditions, water would exist only as a solid (ice) and cannot exist as a gas (vapour).

4. What does the water phase diagram tell us about the properties of water?

The water phase diagram provides information about the properties of water, such as its melting point, boiling point, and critical point. It also shows the conditions under which water can exist as a solid, liquid, or gas, and how changes in temperature and pressure can affect these phases.

5. Why is the water phase diagram important?

The water phase diagram is important because it helps us to understand the behaviour of water under different conditions. It is also used in various fields, such as chemistry, meteorology, and engineering, to predict and control the physical states of water in different environments.