- #1
crosbykins
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Homework Statement
A student attempts to identify a metal by measuring its specific heat capacity. 100g of the metal is heated to 75°C and then transferred to a 70g copper calorimeter containing 200g of water at 20°C. The temperature of the final mixture is 25°C.
Homework Equations
heat lost by sample = heat gained by water
The Attempt at a Solution
Given metal: Given water:
m = .1kg m = .2kg
c = ? c = 4.2e3 J/kg°C
t1 = 75°C t1 = 20°C
t2 = 25°C t2 = 25°C
c = - [.2kg * 4.2e3 J/kg°C]/ *25°C - 20°C/
.1kg 25°C - 75°C
= 840 J/kg°C
ok well..this is wrong...does the fact that the calorimeter is 70g copper affect the answer