Question

To start a great night of doing physics homework, you sit down to pour yourself a good cup of coffee. Your coffee mug has a mass 122 g and a specific heat of 1089 J/kg K. The mug starts out at room temperature (23.6 ^o C). Your coffee has an initial temperature of 81.7 ^oC and has the same specific heat as water (4186 J/kg K).

1.) What is the final temperature of coffee and mug once they come to thermal equilibrium? T_final= _____ Celsius

2.) Now lets assume that instead of the 122 g of coffee, you pour in 230 g of coffee. What is the final temperature of the coffee and mug? (Again, assume that you loose no heat to the outside.) T_final= _____ Celsius

3.) Now lets say that along with the 230 g of coffee, you pour in 11.7 g of cream in your mug. The cream has an initial temperature of 5.6 ^oC and also has the same specific heat as water. What is the final temperature of the coffee, cream and mug? (Again, assume that you loose no heat to the outside.) T_final= _____ Celsius

Answer 1