Thermal equilibrium
Chemistry
Level
1
In a thermally isolated tub, we have 600,0 Kg of water at the temperature of 25C°, then a block made of copper of mass 448,0 Kg is added. If the block has an initial temperature of 580C° what is approximately the temperature (in C°) when the thermal equilibrium is reached?
99°C
61°C
75°C
73°C
85°C
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1 solution
Q = m ∗ c ∗ Δ t
Q a c q u i r e d H 2 O = - Q g i v e n C u
m H 2 O ∗ c H 2 0 ∗ Δ t = − m C u ∗ c C u ∗ Δ t
Where Δ t = ( t − t 0 )
6 0 0 , 0 0 k g ∗ 1 , 0 0 k g ° C k c a l ∗ ( t − 2 5 ° C ) = − 4 4 8 , 0 0 k g ∗ 0 , 0 9 3 k g ° C k c a l ∗ ( t − 5 8 0 ° C )
t ≃ 6 1 ° C