Question

What is triple point of water and why is it called triple point?

Answer 1

A point at which water exhibits all three states(solids,liquid,gases) at particular pressure and temperature is known as triple point of water......
pressure 611.2pa,temperature 273k
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since it exhibits all 3 states at one point it us known as triple point.....
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Answer 2

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Triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium .