A17kgpieceofzincat73◦Cisplacedina container of water. The water had a mass of 39 kg and a temperature of 11◦C before the zinc was added.
What is the final temperature of water and zinc? The specific heat of zinc is 388 J/kg ·◦ C and of water 4180 J/kg ·◦ C.
Answer in units of ◦C
What is the final temperature of water and zinc? The specific heat of zinc is 388 J/kg ·◦ C and of water 4180 J/kg ·◦ C.
Answer in units of ◦C
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Q= mc delta theta. theta will be written as x
Heat lost by zinc = heat gained by water.
(17)(388)(73 - x) = (39)(4180)(11 + x)
481 508 - 6596x = 1 793 220 + 163 020x
1 793 220 - 481 508 = 163 020x + 6596x
1 311 712 = 169 616x
x= 1 311 712/169 616
x= 7.7 deg C
Heat lost by zinc = heat gained by water.
(17)(388)(73 - x) = (39)(4180)(11 + x)
481 508 - 6596x = 1 793 220 + 163 020x
1 793 220 - 481 508 = 163 020x + 6596x
1 311 712 = 169 616x
x= 1 311 712/169 616
x= 7.7 deg C
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ok