Quiz1-Solutions

# Quiz1-Solutions - Problem 1 both quizzes The reasoning is...

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Problem 1 both quizzes: The reasoning is the same for both quizzes so I will use the first quiz question. A block of iron at initial T = 500 Celsius is placed on top of a block of ice (solid water) at initial T = -50 Celsius in an insulating container so no heat can be transferred into or out of the container. Parts of the graphs of T vs Energy added for the three-phase model are shown below. The temperature scales are slightly different so be careful. a) The approximate final equilibrium temperatures, T final Iron and T final water . b) The final phases of the iron and water. c) The approximate total heat transferred in the process. The main ideas: Closed system so net heat is zero (Q=0). Energy will still flow between the objects in the system, the iron and the ice, and this is called heat as well. However the net heat flow is zero! The net energy change must also be zero as it is a closed system (energy conservation) and therefore the energy that is lost by the Iron will be the same as the energy gained by the Ice . The final temperatures will be the same when the system comes to thermal equilibrium. The

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Quiz1-Solutions - Problem 1 both quizzes The reasoning is...

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