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

Getting Started With Solar

Getting Started With Solar

Do we really want the one thing that gives us its resources unconditionally to suffer even more than it is suffering now? Nature, is a part of our being from the earliest human days. We respect Nature and it gives us its bounty, but in the recent past greedy money hungry corporations have made us all so destructive, so wasteful.

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