exam1_solutions_F - 1. For each of the processes listed...

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1. For each of the processes listed below indicate whether the entropy of the system will increase, decrease, or stay the same. The system is indicated in bold in each case. Briefly explain your answer in each case A(20). A cup of hot coffee in the classroom becomes cold during a lecture. 0 S ∆< (follows from ln ... P SC T =+ as discussed in the class) B(20). A piece of ice melts. 0 S ∆> (becomes more disordered. Also, heat is given to ice) C(20). 1 kg of honey undergoes a reversible adiabatic process (no heat exchange with the surroundings), in which the pressure is increased from P 1 = 1 atm to P 2 = 2 atm. 0 S ∆= (in a reversible process / dS q T δ = and 0 q = ) 2. For each of the processes listed below indicate whether the Gibbs free energy of the system G will increase, decrease, or stay the same. The system is indicated in bold in each case. Briefly explain your answer in each case. A(20) . Ideal gas is compressed (i.e., its volume is decreased) reversibly at constant temperature.
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This note was uploaded on 09/06/2009 for the course CH 353M taught by Professor Lim during the Spring '08 term at University of Texas at Austin.

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exam1_solutions_F - 1. For each of the processes listed...

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