What is the approximate critical pressure of water?

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Multiple Choice

What is the approximate critical pressure of water?

Explanation:
Critical pressure is the pressure at the critical point where liquid and vapor become one indistinguishable phase. For water, this occurs around a temperature of 374°C, and the pressure needed to reach that state is about 22.1 MPa (roughly 220 bar, about 3,200 psi). This fixed property is why 22.1 MPa is the correct approximate value—the other numbers are far from the water’s critical point and do not represent the pressure at which liquid and vapor phases merge.

Critical pressure is the pressure at the critical point where liquid and vapor become one indistinguishable phase. For water, this occurs around a temperature of 374°C, and the pressure needed to reach that state is about 22.1 MPa (roughly 220 bar, about 3,200 psi). This fixed property is why 22.1 MPa is the correct approximate value—the other numbers are far from the water’s critical point and do not represent the pressure at which liquid and vapor phases merge.

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