Learning Goal: Calorimetry: Three Substances The ceramic coffee cup in the figure with m = 118 g and c = 1090 J/(kg - K), is initially at room temperature (24.0 °C). Coffee and cream will be added to the cup. Assume that no heat is exchanged with the surroundings, and that the specific heat of coffee and cream are the same as the specific heat of water, c = 4186 J/(kg.K) In both of the two situations, the same amount of coffee 220 g at the same initial temperature 79.0 C is added to the cup. But different amounts of cream of 6.0 °C is added to the cup. note: J/(kg. K) =J/(kg. °C) After 220 g of 79.0°C coffee and unknown amount of 6.0 °C cream are added to the cup, the equilibrium temperature of the system (Coffee + Cream + Cup) is measured to be 58.0 °C. How much cream in grams was added? Follow the steps in "hints". Enter the mass of the cream in Grams, keep 2 digits after the decimal point ► View Available Hint(s) mass of cream mcream = Submit 15| ΑΣΦ Part B www ? grams New Situation: The amount of coffee is still 220 g, its initial temperature is still 79.0 °C. Now the coffee and 23.0 g of 6.0 °C cream are added to the cup with the same mass and same initial temperature as in Part A. You will find the final temperature of the system (Coffee + Cream + Cup) when thermal equilibrium is reached. If 220 g of 79.0°C coffee and 23.0 g of 6.0 °C cream are added to the cup, what is the equilibrium temperature of the system? Follow the steps in "hints".

At 25.0 m below the surface of the sea, where the temperature is 5.00C, a diver exhales an air bubble having a volume of 1.00 cm3. If the surface temperature of the sea is 20.0C, what is the volume of the bubble just before it breaks the surface?

For the human body, what is the rate of heat transfer by conduction through the body's tissue with the following conditions: the tissue thickness is 3.00 cm, the difference in temperature is 2.00 , and the skin area is 1.50 m2. How does this compare with the average heat transfer rate to the body resulting from an energy intake of about 2400 kcal per day? (No exercise is included.)

A heavy pot made of copper has a mass of 2.24 kg (including the lid) and is heated in an oven to a temperature of 154 °C. You pour 0.12 kg of water at 26.0 °C into the pot and quickly close the lid so that no steam can escape. We assume that no heat is lost to the surrounding. For copper, Ccopper 390 J/(kg.K) For water, Cwater 4190 J/(kg.K), L, = 2256 kJ/kg, L; = 333 kJ/kg. %3D What is the final mass of steam in the pot? on