Question

heated blocks of iron used to be warm bed. A 1600g brick of iron heated to 155c would release how many joules of heat energy as it cooled to 25c?

Answer 1

We are going to use this formula : 

Q = M*C*ΔT

when Q is the heat released by the material in J 

and M is the mass in gram = 1600 g 

C is the specific heat capacity of iron = 0.4494 J/g

and ΔT is the changing in temperature = 155 - 25 = 130 °C

So by substitution:

∴ Q = 1600 g * 0.4494 J/g * 130 °C

       = 93475 J

∴ The amount of heat released in Joule = 93475 J