★Specialized Examination for Chemical Engineering ★ — One question per day (2016-1-20) — Points are awarded for participation
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Points system for the daily question: Participation – 1~3 points; Correct answer – 5 points; In-depth analysis – 5~10 points. The answer is provided the next day. Due to limited capabilities, I am unable to provide more in-depth explanations for each question; therefore, on the second day, in addition to offering reference options, I will also remove the restriction on reading replies. I hope that all candidates can learn from one another and improve together! Daily Question (2016-1-20): 1. If Q and W represent the heat added to the system and the work done on the system by the surroundings, respectively, and △U, g△Z, and △u²/2 represent the changes in the internal energy, potential energy, and kinetic energy per unit mass of fluid, then which of the following options represents the energy balance equation for an open system undergoing a steady-state process? A. △U + g△Z + △u²/2 = Q – W B. △U + g△Z + △u²/2 = W – Q C. △U + g△Z + △u²/2 + Q + W = 0 D. △U + g△Z + △u²/2 = Q + W Answer: D
D. △U + g△Z + △u²/2 = Q + W.
A、△U+g△Z+△u2/2=Q-W ~~~~~~~~~~~~~~~~~
Raise buildings, amass wealth. D. △U + g△Z + △u²/2 = Q + W
1. If Q and W represent the heat added to the system and the work done on the system by the surroundings, respectively, and △U, g△Z, and △u²/2 represent the changes in the internal energy, potential energy, and kinetic energy per unit mass of fluid, then which of the following options represents the energy balance equation for an open system undergoing a steady process? ( A ) A. △U+g△Z+△u²/2=Q-W B. △U+g△Z+△u²/2=W-Q C. △U+g△Z+△u²/2+Q+W=0 D. △U+g△Z+△u²/2=Q+W
1. If Q and W represent the heat added to the system and the work done on the system by the surroundings, respectively, and △U, g△Z, and △u²/2 represent the changes in the internal energy, potential energy, and kinetic energy per unit mass of fluid, then which of the following options represents the energy balance equation for an open system undergoing a steady process? (D) A. △U+g△Z+△u²/2=Q-W B. △U+g△Z+△u²/2=W-Q C. △U+g△Z+△u²/2+Q+W=0 D. △U+g△Z+△u²/2=Q+W
A...................