If gas is stored under high pressure, it may revert to which state when the pressure is reduced?

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Multiple Choice

If gas is stored under high pressure, it may revert to which state when the pressure is reduced?

When you release pressure from a compressed gas, the gas tends to expand and cool. That cooling can cause the gas to reach a temperature at which it will condense into a liquid, provided the temperature is below its condensation (boiling) point at that pressure. So, as the pressure is reduced, the gas may change into a liquid if it cools enough. This is why liquid is the best answer: condensation from gas to liquid can occur when the gas is expanded and cooled during depressurization. Plasma would require ionization and high energy, solids would need much lower temperatures than typically achieved just by depressurization, and the gas state would not be the result of the pressure drop alone under ordinary conditions.

When you release pressure from a compressed gas, the gas tends to expand and cool. That cooling can cause the gas to reach a temperature at which it will condense into a liquid, provided the temperature is below its condensation (boiling) point at that pressure. So, as the pressure is reduced, the gas may change into a liquid if it cools enough. This is why liquid is the best answer: condensation from gas to liquid can occur when the gas is expanded and cooled during depressurization. Plasma would require ionization and high energy, solids would need much lower temperatures than typically achieved just by depressurization, and the gas state would not be the result of the pressure drop alone under ordinary conditions.

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