Physics 11 question help?

  • Thread starter roxxyroxx
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  • #1
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Homework Statement



A 3.0kg block of ice made in a fridge has an initial temp. of -5.0[tex]\circ[/tex]C. It
is then moved to a much colder freezer. how much thermal energy is released by the ice as it cools to -40.0[tex]\circ[/tex]C?

Homework Equations


EH = mc[tex]\Delta[/tex]T
for water, c = 4186 J/kg/[tex]\circ[/tex]C


The Attempt at a Solution


EH = mc[tex]\Delta[/tex]T
EH = (3.0kg)(4186 J/kg/[tex]\circ[/tex]C)(-40.0[tex]\circ[/tex]C - -5.0[tex]\circ[/tex]C)
= -439530 J
but the answer should be 2.2 x 10^5 J
help?
 
Last edited:

Answers and Replies

  • #2
LowlyPion
Homework Helper
3,097
5
The specific heat of ice is different from that of water.
 

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