The value of specific heat for copper is 390 J/kg*C, for aluminum is 900 J/kg*C,

Question

The value of specific heat for copper is 390 J/kg*C, for aluminum is 900 J/kg*C, and for water is 4186 J/kg*C
What will be the equilibrium when a 245 g block of copper at 255*C is placed in a 145g aluminum calorimeter cup containing 815g of water at 15*C? The value of specific heat for copper is 390 J/kg*C, for aluminum is 900 J/kg*C, and for water is 4186 J/kg*C
What will be the equilibrium when a 245 g block of copper at 255*C is placed in a 145g aluminum calorimeter cup containing 815g of water at 15*C?
What will be the equilibrium when a 245 g block of copper at 255*C is placed in a 145g aluminum calorimeter cup containing 815g of water at 15*C?

Explanation / Answer

Heat lost by the copper = heat gained by water and the calorimeter

Let the equilibrium temperature = T

Thus,

0.39 * 245 * (255 - T) = 0.90 * 145 * (T-15) + 4.186 * 815 * (T-15)

Thus,

77496.6 = 3637.64 T

T = 77496.6 / 3637.64

= 21.30*C is the equilibrium temperature.

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