Worksheet 20: Multiple Choice; Short Answer. (80 pts.) We learned a ...

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“Thinking” Problem. (40 <strong>pts</strong>.)Consider the reaction:( ) + ( g) ( g):C=C=C: g 4H CH CH CH2 3 2 3Suppose that you start with 5 moles of C31 mole of H2and find that, in equilibrium, the molefraction of propane is .01. La Chatelier’s principle indicates that if you increase the amount of C3,then equilibrium will shift in such a way to reduce the chemical potential of C3.Compute the mole fractions of each substance in equilibrium when you start with 4.99, 5.00,or 5.01 moles of C3. Comment on any anomalous behavior. You will earn extra marks ifyou can derive a general mathematical description of the phenomenon you observe.
Problems 6-10 pertained to the Carnot Cycle. Depending on the direction of the process, itis either a “Carnot refrigerator” or a “Carnot engine.” The Carnot engine is often called aheat pump.(a) Some Canadians heat their homes using what is called a water-exchange heat pump. Inthis case, heat is taken out of well water (at an approximate temperature of 10 C) andtransferred to a cosy Canadian cottage (at an approximate temperature of <strong>20</strong> C). Theefficiency of a heat pump is defined as the amount of work that must be done on thesystem to transfer a given amount of heat to the inside of the cottage. What is theefficiency of the cottage’s heat pump?
Page 1: Worksheet 20:Multiple Choice; Short
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Page 7 and 8: 2. You should remember that the ent
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Page 13: 8. Derive the Gibbs-Duhem-like equa

Worksheet 20: Multiple Choice; Short Answer. (80 pts.) We learned a ...

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