Solve the following equation using the formula Q = mCT

1. The temperature of a 15 kg sample of iron was raised by 25.4C with the addition of 114 J of heat. What is the specific heat of iron?

2. How much heat is required to raise the temperature of 50 L of water from 20C to 150C? The specific heat of water is 4184 J/kgC. (Hint: convert to the correct units)

Solve the following equations using PE = Q

1. A 20 kg lead block is dropped 80cm by a Joule's apparatus causing a stirrer to spin in a sealed chamber filled with 0.75 L of water. Assuming no energy is lost to the environment, determine the temperature change of the water.

2. If 301 J of energy is transferred to a sample of water by a Joule's apparatus, from what height must a 10.0 kg block be dropped to deliver this energy?