What is the rate of exergy destruction for the given process

Question

Problem

1. Flow of 0.1 kg/s hot water at 70^oC is mixed with a flow of 0.2 kg/s cold water at 20^oC in a shower fixture. What is the rate of exergy destruction (irreversibility) for this process?

2. A 1-kg block of copper at 350^oC is quenched in a 10-kg oil bath initially at the ambient temperature of 20^oC. Calculate the final uniform temperature (no heat transfer to/from the ambient) and the change of exergy of the system (copper and oil).

The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.