Problems for Chap

7.1 Two moles of an A-B binary solution with 50 mole % A at 200oC are mixed with three moles of a 20 mole % A solution at 100oC and the resulting mixture is brought to 150oC. The heat capacities of A and B are 36 and 52 J/mole-K, respectively, and the solutions are ideal. Determine the enthalpy and entropy changes for this process and the heat exchanged with the surroundings.

Hint: form the three solutions from pure components at a reference temperature of 100"C

7.2 The data obtained in the water/sulfuric acid mixing demonstration in class for both solutions are shown below.

_Initial volumes, cm3_Temperature, oC

Solution

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Solar Panel Basics

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