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A gas can be liquefied ______. |
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Answer» A gas can be liquefied below its critical temperature. For example, the critical temperature Tc for CO2, O2 and H2 are 31.1°C, −118.8°C and −240 °C respectively. Thus, CO2 gas cannot be liquefied above 31.1 °C however high the pressure may be applied. |
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