Final answer:
The critical temperature of a compressed gas is the highest temperature at which it can exist as a liquid. Carbon dioxide has a critical temperature of 31.0 °C, so a gas with a critical temperature of less than 30 °C cannot be liquefied above this temperature.
the correct answer is C) 30 °C,
Step-by-step explanation:
The critical temperature of a compressed gas is the temperature above which a gas cannot be liquefied, regardless of the pressure applied. According to the provided reference information, carbon dioxide (CO2) exemplifies this property as it has a critical temperature of 31.0 °C.
Thus, a compressed gas with a critical temperature of less than 31.0 °C cannot exist as a liquid above this temperature and is considered supercritical at temperatures higher than this. Based on the options provided, the correct answer is C) 30 °C, which is less than the critical temperature of CO2.
he critical temperature of a compressed gas is the temperature above which the gas cannot be liquefied, regardless of the pressure applied.
In other words, it is the highest temperature at which the gas can exist as a liquid. If a compressed gas has a critical temperature that is less than a certain value in degrees Celsius, it means that the gas cannot be liquefied at temperatures higher than that value.
According to the information provided, the question asks for the critical temperature of a compressed gas. The correct answer is A) 45 degrees Celsius, as it is the only option that is less than the critical temperature of the gas.