[Daily Question] Basic Process Knowledge (True/False Questions) 20190407
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During a single vaporization process, when the temperature reaches the dew point of the mixture, the entire system turns into a vapor phase. In gradual vaporization, however, it is only when the temperature is close to that of the pure component with the highest boiling point that the remaining trace amounts of liquid can be completely vaporized; this temperature is undoubtedly higher than the dew point of the mixture. Therefore, if the vaporization rate is the same, the temperature for one-time vaporization is always higher than that for gradual vaporization. Incorrect; during a single vaporization process, once the temperature reaches the dew point of the mixture, the entire system converts to a vapor phase. In gradual vaporization, however, it is only when the temperature is close to that of the pure component with the highest boiling point that the remaining trace amounts of liquid can be completely vaporized, and this temperature is undoubtedly higher than the dew point of the mixture. Therefore, if the vaporization rate is the same, the temperature for one-time vaporization is always lower than that for gradual vaporization.
Just one character difference! It is “below”.
Error. 【Thus, the temperature for vaporization in one step is always lower than that for gradual vaporization. 】
During a single vaporization process, when the temperature reaches the dew point of the mixture, the entire system turns into a vapor phase. In gradual vaporization, however, it is only when the temperature is close to that of the pure component with the highest boiling point that the remaining trace amounts of liquid can be completely vaporized; this temperature is undoubtedly higher than the dew point of the mixture. Therefore, if the vaporization rate is the same, the temperature for one-time vaporization is always higher than that for gradual vaporization. Correct