01 2006.02.17

01 2006.02.17 - Physics 122 2/17/06 Name_Section_ Exam 1 1....

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Physics 122 2/17/06 Exam 1 Name____________________________________Section______________ 1. You have 300 g of coffee at 100 ° C in a Styrofoam cup. How much ice at 0 ° C would you have to add to bring the temperature of the coffee to 0 ° C, with no ice left over? Ignore heat transfer to the cup and to the surroundings. Please use 4.0 × 10 3 J/kg K for the specific heat of coffee, and 3.0 × 10 5 J/kg for the latent heat of fusion of ice, and give your result to two significant figures. (10 points)
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Name____________________________________Section______________ 2. A diatomic ideal gas undergoes an isothermal compression from state a to state b (process ab ). The pressure at state a is p a , and the volume at state a is V a . The volume at state b is V b . It then undergoes an adiabatic expansion to state c (process bc ). Then volume at state c is equal to the original volume V a . a. Represent these two processes as accurately as possible on the
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01 2006.02.17 - Physics 122 2/17/06 Name_Section_ Exam 1 1....

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