How much heat is needed to raise the temperature of a 2.5 g piece of copper wire from 20. °C to 80. °C? How much heat is needed to increase the temperature of an equivalent mass of aluminum by the same amount? Once heated, which metal will cool faster?
How much heat is needed to raise the temperature of a 2.5 g piece of copper wire from 20. °C to 80. °C? How much heat is needed to increase the temperature of an equivalent mass of aluminum by the same amount? Once heated, which metal will cool faster?
When the temperature rise of a 1 g of substance takes place by 1°C, some amount of heat is required to do so. This required amount of energy is termed as specific heat capacity.
Given:
Amount of copper wire, m = 2.5 g
Temperature change, T = (80C - 20C) = 60C
Since, we are not provided with the specific heat capacity (C) values of Cu and Al, we are using the actual C-values for both the metals.
C of copper = 0.385 J/gC
C of aluminum = 0.900 J/gC
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