[Daily Question] Registered Exam Version 2018.11.26
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In a container with a constant temperature of 100°C and a volume of 2 dm3, there is 0.04 mol of water vapor. If an additional 0.02 mol of H2O(l) is added to the aforementioned container, the amount of H2O in the container at equilibrium will necessarily be ( ). A. Gaseous B. Liquid C. Equilibrium between gas and liquid phases D. Phase cannot be determined. The reference answers can be seen after responding; scoring is possible by identifying the key points. Answer: A is correct. 3 for wealth, 1 incorrect for wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately.
This post was last edited by yanyiyang on 2018-11-26 at 17:13. A. According to PV=nRT, the maximum pressure after addition is P=nRT/V=(0.04+0.02)*8.314*373.15/2 = 93.071 kPa. The saturated vapor pressure of water at 100 degrees is 101.3 kPa