Two experimental runs are performed to determine the calorimetric properties of an alcohol that has a melting point of -10°c. in the first run, a 200-g cube of frozen alcohol, at the melting point, is added to 300 g of water at 20°c in a styrofoam container. when thermal equilibrium is reached, the alcohol-water solution is at a temperature of 5.0°c. in the second run, an identical cube of alcohol is added to 500 g of water at 20°c and the temperature at thermal equilibrium is 10°c. the specific heat of water is 4190 j/kg • k. assume that no heat is exchanged with the styrofoam container and with the surroundings. the heat of fusion of the alcohol is closest to