Take water in a beaker and raise its temperature to 374°C. How much temperature should be
raised in °C) further to reach the (critical temperature of water+2°C)?
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Gases can be converted to liquids by compressing the gas at a suitable temperature.
Gases become more difficult to liquefy as the temperature increases because the kinetic energies of the particles that make up the gas also increase.
The critical temperature of a substance is the temperature at and above which vapor of the substance cannot be liquefied, no matter how much pressure is applied.
Every substance has a critical temperature. Some examples are shown below.
The critical pressure of a substance is the pressure required to liquefy a gas at its critical temperature. Some examples are shown below.
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