A mass having 286.8 g with unknown composition is heated in an oven to a temperature of 325.4 °C. The mass is then dropped to the strong insulated calorimeter having 865.9 g of water. The initial temperature of water is around11.82 °C. The final equilibrium temperature of the system is around 17.39 °C. Suppose that the mass and water are in the isolated system and the water doesn’t vaporize. No heat is transferred to the water throughout this experiment. The specific heat of the water is around 4190 J/kg-K. Determine the specific heat of the unknown mass?