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Unformatted text preview: 3) 4) A heat pump with a COP of 4.7 absorbs heat from the atmosphere at a rate of 14 kW. At what rate is it doing work? A) 66 kW B) 3 kW C) 17 kW D) 52 kW 4) 5) A 9.0-mol monoatomic ideal gas at 312.0 K does a free adiabatic expansion (W = Q = 0) until its volume increases 10.0-fold. What is the change in entropy? Express your answer in terms of R. The formula for the entropy of an ideal gas is S = nR ln[(V/n) T 3/2 ] + const. A) 21 R J/K B) 6500 R J/K C) 28,000 R J/K D) 0.0 R J/K 5) 6) 15.0 kg of mercury (specific heat 140 J/kg K) is heated from 301.0 K to 346.0 K. How much does entropy increase? Use the formula for the entropy of a system with a constant heat capacity. A) 47 J/K B) 95,000 J/K C) 290 J/K D)-0.91 J/K 6) Answer Key Testname: PHYS 2C W06 QUIZ 4 1) D 2) A 3) B 4) B 5) A 6) C...
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- Winter '05