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The value of specific heat for copper is 390 J/kg⋅C∘, for aluminun is 900 J/kg⋅C∘,and for...

The value of specific heat for copper is 390 J/kg⋅C∘, for aluminun is 900 J/kg⋅C∘,and for water is 4186 J/kg⋅C∘.
What will be the equilibrium temperature when a 275 g block of copper at 255 ∘C is placed in a 155 g aluminum calorimeter cup containing 815 g of water at 16.0 ∘C?

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Homework Answers

Answer #1

using equation

mf Cf Tf = mi Ci Ti where i = 1 , 2 , 3............

( 0.275 X 390 + 0.155 X 900 + 0.815 X 4186 ) Tf = ( 0.275 X 390 X 255 + 0.155 X 900 X 16 + 0.815 X 4186 X 16 )

Tf = ( 0.275 X 390 X 255 + 0.155 X 900 X 16 + 0.815 X 4186 X 16 ) / ( 0.275 X 390 + 0.155 X 900 + 0.815 X 4186 )

Tf = ( 0.275 X 390 X 255 + 0.155 X 900 X 16 + 0.815 X 4186 X 16 ) / ( 0.275 X 390 + 0.155 X 900 + 0.815 X 4186 )

Tf = 23.0066oC

the equilibrium temperature is Tf = 23.0066oC

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