- #1
ihearyourecho
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Homework Statement
A 8.0×10^-2 kg ice cube at 0.0 degrees C is dropped into a Styrofoam cup holding 0.35 kg of water at 12 degrees C.
A) Find the final temperature of the system. Assume the cup and the surroundings can be ignored.
B) Find the amount of ice (if any) remaining.
C) Find the initial temperature of the water that would be enough to just barely melt all of the ice.
Homework Equations
Q=m*C*deltaT
Q=m*Lfusion
The Attempt at a Solution
Qwater=m*C*deltaT = .35kg * 4186J/kg*k *12k = 17581.2J
Qiceto0celcius=0 because it's already at 0 celcius
Q1=Mice*Lfusion = (8*10^-2kg)*(33.5*10^4 J/kg) = 26,800J
17581.2 J - 26800J = -9218.8 J
Q2=(Mwater+Mice)*C*deltaT
-9218.8 J = (.35kg + .08kg)*4186 J/kg*k * deltaT
deltaT=-5 degrees celcius
This answer is wrong, but I'm not sure where I went wrong. Any help would be great :)