Answer in Physics for Ken #162627
1. A workman needs to know the temperature inside the oven. He removes 2.0-lb. iron bar from the oven and places in a 1-lb aluminum container partially filled with 2.0 lb. of water. If the temperature of the water rises from 70 to 120oF, what was the oven temperature?
Heat given out by the iron bar to the aluminum container and water:
Heat received by the container with water:
As they reach thermal equilibrium:
Note: specific heat of iron is 0.11 Btu/(lb·°F), specific heat of aluminum is 0.258 Btu/(lb·°F).