How much heat is given out when a piece ofiron of mass 80g and specific heatcapacity 460J/kg/°C cools from 100°cto 40°C.

Question

asked Jul 7, 2023 234k views

1 Answer

Avnesh Shakya · Answer 1 · 2023-07-13T09:42:49+0000

In order to calculate the amount of heat, we can use the formula below:

$Q=m\cdot c\operatorname{\cdot}\Delta T$

Where Q is the heat, m is the mass, c is the specific heat and DeltaT is the change in temperature.

So, using m = 0.08 kg, c = 460 J/kg°C and DeltaT = -60°C (from 100°C to 40°C), we have:

$\begin{gathered} Q=0.08\operatorname{\cdot}460\operatorname{\cdot}(-60) \\ Q=-2208\text{ J} \end{gathered}$

Therefore the heat given out is 2208 Joules.