Eight fluid ounces (1 qt = 32 oz) of a beverage in a glass at 18.0°c is to be cooled by adding ice and stirring. the properties of the beverage may be taken to be those of liquid water.
the enthalpy of the ice relative to liquid water at the triple point is 348 kj/kg.

estimate the mass of ice (g) that must melt to bring the liquid temperature to 4°c, neglecting energy losses to the surroundings.

(note: for this isobaric batch process, the energy balance reduces to q δh.)

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false