9.14 Water flows steadily into a domestic radiator at a temperature of 80 C and leaves...

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9.14 Water flows steadily into a domestic radiator at a temperature of 80 °C and leaves at a temperature of 65 °C. Evaluate the heat transfer from the water per kilogram of water flowing, assuming: (a) the specific heat of water at constant pressure to be constant and equal to 4-19 × 10° J/kg K; (b) the enthalpy of water at a given temperature to be equal to the enthalpy of saturated water at that temperature. Deglect changes in kinetic and gravitational-potential energies. 9.14 Water flows steadily into a domestic radiator at a temperature of 80 °C and leaves at a temperature of 65 °C. Evaluate the heat transfer from the water per kilogram of water flowing, assuming: (a) the specific heat of water at constant pressure to be constant and equal to 4-19 × 10° J/kg K; (b) the enthalpy of water at a given temperature to be equal to the enthalpy of saturated water at that temperature. Deglect changes in kinetic and gravitational-potential energies.