Phase Change Gizmo

Name(s) ______Date______Hr. ____

Directions 1. Logon to explorelearning.com 2. Open “Phase Changes” gizmo

Measuring Heat of Fusion: 3. Set up – water temp 10C , ice volume 20cc, altitude 0m, Heat 0 J/s 4. Run the simulation until temperature stabilizes

Questions Does all the ice melt ______

What is the final temp of the water ______

0 Determine the heat lost (Qwater) by the water in the beaker (assume cwater = 1 cal/g/ C)

Work: Qwater = ______

Where does the heat lost from the water go? ______

Determine the mass of ice melted from the change in volume of the water. Assume that the density of water at 00C is 1 g/cc.

mice = ______g

Determine the latent heat of fusion for water using your answers above.

Work: Lf = ______cal / g Directions 5. Reset the ice volume to 0cc and water temp to 00C 6. Use the add/remove heat energy and time to determine the latent heat of fusion of water a different way. 7. Explain what you did and show your calculations

______

Calculations: Lf = ______cal / g

Measuring the Heat of Vaporization: 8. Set up - water temp 1000C ice volume 0cc 9. Use add/ remove heat energy and time to determine the latent heat of vaporization of water. Explain what you did and show calculations leading to LV.

______

Calculations: LV = ______cal / g