Question

A hot iron ball is dropped into 200g of cooler water. The water temperature increases by 2.0 degrees C and the temperature of the ball decreases by18.6 degrees C. What is the mass of the iron ball?

Answer 1

Q1=Q2
c(i) •m(i) •ΔT(i) = c(w) •m(w) •ΔT(w)
444• m•18.6=4180•0.2•2
m=4180•0.2•2/444•18.6 =0.2 kg

Answer 2

1494