In a Water Heating System, Cold Water at 5°C Flowing

Multiple Choice

In a water heating system, cold water at 5°C flowing at a rate of 5 kg/s is mixed adiabatically with hot water at 80°C flowing at a rate of 2 kg/s. The exit temperature of the mixture is

A) 26.4°C
B) 42.5°C
C) 40.0°C
D) 64.3°C
E) 55.2°C