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olso4142
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[SOLVED] phase changes
A 40.0 g block of ice is cooled to -78oC. It is added to 560 g of water in an 80.0 g copper calorimeter at a temperature of 25oC. Determine the final temperature . If not all the ice melts, determine how much ice is left.
Q=mC∆T
Q=mL (phase change)
Q(lost)+ Q(gained)=0
energy to bring water to O degrees C
Q=mC∆T
=(.040kg)(4186J/KgC)(0-25C)
=-4186J
Energy to bring copper to 0 degrees C
Q=mC∆T
=(0.800kg)(386J/kgC)(0-25C)
=-7720
Energy to bring ice to 0
Q=mC∆T
=(0.040kg)(?)(0--78)
=? is the specific heat of ice the same as water?
energy phase change
Q=mL
=(.040kg)(?)
is the latent heat of ice the same as the latent heat for freezing water?
and then after finding all that how do i know if there is ice left?
Homework Statement
A 40.0 g block of ice is cooled to -78oC. It is added to 560 g of water in an 80.0 g copper calorimeter at a temperature of 25oC. Determine the final temperature . If not all the ice melts, determine how much ice is left.
Homework Equations
Q=mC∆T
Q=mL (phase change)
Q(lost)+ Q(gained)=0
The Attempt at a Solution
energy to bring water to O degrees C
Q=mC∆T
=(.040kg)(4186J/KgC)(0-25C)
=-4186J
Energy to bring copper to 0 degrees C
Q=mC∆T
=(0.800kg)(386J/kgC)(0-25C)
=-7720
Energy to bring ice to 0
Q=mC∆T
=(0.040kg)(?)(0--78)
=? is the specific heat of ice the same as water?
energy phase change
Q=mL
=(.040kg)(?)
is the latent heat of ice the same as the latent heat for freezing water?
and then after finding all that how do i know if there is ice left?