Heat and Phase Change. What affects heat transfer?. The material: conductor or insulator? Area. Ex: a bigger window vs. a smaller one. Thickness. Ex: heat escapes a thinner styrofoam cup than a thicker one. Heat and State of Matter.
Heat and Phase Change
Given info about ice:
m = 50.0 gΔHfusion = 333 J/g
Given info about water:
C = 4.18 J/g°CTinitial = 26.5°C Tfinal = 0.0°CΔT = -26.5°C (Tfinal - Tinitial )
The energy gained by the ice is equal to the energy lost from the water.
Qice = -Qliquidwater
Qice = mΔHfusion = (50.0 g)(333 J/g)
Qice = 16650 J
16650 J = -Qliquid water
16650 J = -mliquidwaterCliquid waterΔTliquid water
16650 J = -mliquidwater (4.18 J/g°C)(-26.5°C)
16650 J = -mliquidwater(-110.77 J/g)
mliquid water = 150.311 g