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.
It will stay at 54 oC until the last of the liquid becomes a solid. Then it will decrease again.
What is the minimum amount of liquid water at 26.5 degrees that would be required to completely melt 50.0 grams of ice? The specific heat capacity of liquid water is 4.18 J/g°Cand the specific heat of fusion of ice is 333 J/g.
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 = -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