Question

Calculate the number of joules of heat energy needed to increase the temperature of 25.0 g of metal from 21.0 ºC to 80.0 ºC. The specific heat of the metal is 0.521 J/gºC.

Answer 1

Q = 768.47 J

Step-by-step explanation:

Given that,

Mass of the metal, m = 25 g

Initial temperature, T₁ = 21.0 ºC

Final temperature, T₂ = 80.0 ºC

The specific heat of the metal is 0.521 J/gºC.

We know that the heat released due to the change in temperature is given by :

`Q=mc\Delta T\\\\=25* 0.521* (80-21)\\Q=768.47\ J`

Hence, 768.47 J of heat energy will be needed.