A food product is being frozen in a system with capacity remove 6000 kJ of thermal energy. Assume the product has a specific heat of 3.5 kJ/(kg 8C) above the initial freezing temperature of 228C, a latent heat of fusion of 275 kJ/kg, and a specific heat of 2.8 kJ/(kg 8C) for the frozen product below 258C. Estimate the final temperature of 15 kg of frozen product, if the initial temperature is 208C.