1. Determine the irreversibility produced as 10.0 kg of liquid water at 10.0°C is adiabatically mixed with 20.0 kg of liquid water at 80.0°C. The specific heat of the water is 4.20 kJ/kg·K, and the local environment is at 0.101 MPa and 20.0°C.
2. Here is the classical coffee and cream problem. Which of the following processes produces less irreversibility?
a. Mixing cream with hot coffee and then letting the mixture cool to the drinking temperature.
b. Letting the coffee cool to a temperature such that, when the cream is added, the mixture will be at the drinking temperature. Do not ignore the cooling heat transfer irreversibility.