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# sample2 - More Sample Exam#1 Problems Problem#6 Two blocks...

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More Sample Exam#1 Problems Problem #6 Two blocks of metal, one with a heat capacity of 2000.0 J/K and an initial temperature of 700.0 K, and the second with a heat capacity of 500.0 J/K at a temperature of 200.0 K are brought into thermal contact. a) What is the final temperature of the blocks after thermal equilibrium is reached? T final = _____________ K b) What is the entropy change of the Universe resulting from this procedure? S Universe = _____ ____ ______ J/K Problem #7 Often, meteorologists treat the first 10 km of the Earth’s atmosphere as isentropic. If this is true, and the conditions at sea level are p=1.000 atm and T = 300.0 K, estimate the temperature of the atmosphere at an altitude of 10 km where the pressure is 0.275 atm. Assume the air is an ideal gas with a molar constant-volume heat capacity, V C , of (5/2)R. T 10km = ____________________K Problem #8 Consider a gas that obeys the following equation of state: nRT ) nb V ( p = - where b is a positive constant specific to the gas. Indicate whether the following statements regarding this gas are true or false: ________ The compressibility factor, Z, for this gas is always greater than one.

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