A200-gram liquid sample of alcohol x is prepared at -10°c. the sample is then added to 300 g of water at 20°c in a sealed styrofoam container. when thermal equilibrium is reached, the temperature of the alcohol-water solution is 10°c. what is the specific heat capacity of the alcohol? assume the sealed container is an isolated system. the specific heat capacity of water is 4.19 kj/kg · °c.

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)