1. 1 This graph can be divided into 3 distinct regions, Identify them and explain what is occurring in each segment.

2. 2 Sketch shape if: 1.) The beaker had double the amount of ice and water

3. 3 Sketch shape if: 1.) The hot plate was set to half power instead of full

4. 4 Sketch shape if: 1.) Alcohol was used instead of water

5. 5 Phase Changes!

6. 6 Theoretical Results

7. 7 Latent Heat – Energy per unit mass added or removed during a phase change L = Q/m Q = mL Latent heat of fusion Latent heat of vaporization

8. 8 Energies 1 g of ice takes 333 J to melt. 1 g of water takes 4.186 J to increase by 1 O C. 1 g of water takes 2,260 J to vaporize into steam

9. 9 How many Joules of energy are needed to melt 157 g of ice? Q = mL M = 157 g L = 333 J/g Q = 157 g (333 J/g) Q = 52300 J

10. 10 Specific Heat Capacity Amount of heat required to raise temperature of 1 gram by 1 degree.

11. 11 Heat capacity varies for different materials MaterialJ/g o C Water4.186 Air1.005 Aluminum.900 Steel.448 Asphalt.920 Wood1.700 Lead.128 Hydrogen(gas)14.3

12. 12 Specific Heat Capacity Specific heat capacity = C p Energy transferred as heat = Q Mass = m Change in temperature = ΔT

13. 13 -System placed in insulated container of water. -Wait until it reaches thermal equilibrium Heat lost by Sample = Heat gained by Water Calorimetry Q sample = -Q water Cp sample M sample ΔT sample = -Cp water M water ΔT water

14. 14 A.5 kg bolt at unknown temp is dropped into a calorimeter containing.15 kg of water with T i of 21.0 o C. The system reaches a final temperature of 25.0 o C. If the metal has a heat capacity of 899 J/kg o C, find the initial Temp of the metal.

15. 15 A.225 kg sample of tin at 97.5 o C is dropped into.115 kg of water. The water has a T i of 21.0 o C. If the tin has a heat capacity of 230 J/kg o C, find the final equilibrium temperature of the system?