A calorimeter made of aluminum is of negligible mass and contains 0.25 kg of water. Initially, the water and cup have a common temperature of 22C. A 0.20-kg mass of unknown material is heated to a temperature of 99C and then added to water. The equilibrium temperature of the water and unknown material is 30C. Ignoring the heat gained by the calorimeter and thermometer, determine the specific heat capacity of the unknown material