Questions on Knowledge (Technology) in Petrochemical and Natural Gas Chemical Engineering, April 9, 2010

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We welcome everyone to actively participate in the learning and discussion of professional basic knowledge in the petrochemical technology exchange area! At the same time, I hope other moderators will also participate in this activity, taking turns to come up with questions and discuss various sets of devices! Let’s work together to promote the development of the petrochemical technology exchange zone! The maximum score for this activity is 20 Wealth points. Friendly votes and repeated votes are not allowed; please be careful when posting, as such posts will not be counted as valid scores! To prevent the answers of some members from affecting others, members are asked to hide their own posts while answering questions. Thank you for your cooperation. For specific hiding methods, see: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Multiple-choice question: 1. What is the driving force for gas absorption? A. Density difference B. Temperature difference C. Pressure difference D. Concentration difference 2. Distillation is a two-way mass transfer process that takes advantage of the differences in the of its components. A. Solubility B. Concentration difference C. Volatility D. Density 1. Gases can be liquefied only when . A. Above critical pressure B. Below critical pressure C. Above critical temperature D. Below critical temperature 1. The state function that represents the heat in a constant-pressure process with no other work done is . A. Entropy B. Enthalpy C. Calorific value D. Sensible heat Answer: DCDB