You have just finished preparing a 750 g batch of coffee at a temperature of 95.0 °C. You pour it into a vacuum-sealed stainless steel thermos which is at room temperature (20.0°C). The thermos's inner layers (side walls of the container plus the steel portion of the lid) have a combined mass of 189 g. Before screwing on the lid, you add 15 g of cream from the refrigerator (4.0 °C). What is the temperature of your beverage after a long time has passed? Assume that the thermos is a perfect insulator, and use the following specific heat values: Ccoffee = 4.186J/gºC, Csteel = 0.460 J/g°C, and Ccream = 3.350°C.

You have just finished preparing a 750 g batch of coffee at a temperature of 95.0 °C. You pour it into a vacuum-sealed stainless steel thermos which is at room temperature (20.0°C). The thermos's inner layers (side walls of the container plus the steel portion of the lid) have a combined mass of 189 g. Before screwing on the lid, you add 15 g of cream from the refrigerator (4.0 °C). What is the temperature of your beverage after a long time has passed? Assume that the thermos is a perfect insulator, and use the following specific heat values: Ccoffee = 4.186J/gºC, Csteel = 0.460 J/g°C, and Ccream = 3.350°C.