A well-insulated heat exchanger is to heat water (cp = 4.18 kJ/kgC) from 25 to 60C at

A well-insulated heat exchanger is to heat water (cp = 4.18 kJ/kgˆ™°C) from 25 to 60°C at a rate of 0.50 kg/s. The heating is to be accomplished by geothermal water (cp = 4.31 kJ/kgˆ™°C) available at 140°C at a mass flow rate of 0.75 kg/s. Determine
(a) The rate of heat transfer and
(b) The rate of entropy generation in the heat exchanger.

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Water 25℃ Brine 140 C So 60°C