Heated bricks of blocks of iron were used long ago to warm up beds. A 1.25 kg block of Fe heated to 135 oC would release

Question

Heated bricks of blocks of iron were used long ago to warm up beds. A 1.25 kg block of Fe heated to 135 oC would release how much energy in calories as it cooled to 35.8oC.? (s = 0.45 J/goC

Answer 1

This question was answered last night. The tutor provided a formula, and it is just a matter of plugging the numbers into the formula, in appropriate units. Here is the explanation, again:

 

Q = heat released by the Fe
m = mass of Fe = 1.25 kg
c = specific heat of Fe. Look it up in appropriate units; you probably want it in kcal/(kg°C).
ΔT = temperature drop of the Fe = (135 - 35.8)°C

Q = mcΔT

Plug in the numbers in appropriate units and evaluate.