Question

A 30 gram piece of iron is heated to 100°C and then dropped into

cool water where the iron's temperature drops to 30°C. How many
calories does it loose to the water? (The specific heat of iron is 0.11
cal/g°C).

Answer 1

Q= calories

m = mass

c = specific heat

∆t = temperature difference

Also, Qin = Qout

(as in the amount of energy lost by the iron equals the energy gained by water. the water) so the calories lost is as stated in pict.