Question

A mass of 40g of brass of specific heat capacity 0.85Jg^-1K^-1 is heated in an oven and then quickly transferred into 240g of water at 30°C in a calorimeter of mass 60g and specific heat capacity 0.4Jg^-1 K^-1. If the final temperature is 50°C. What was the temperature of the oven?

Answer 1

Hot Body (Brass)	Cold Body(Water)	Copper Calorimeter	Note
m1 = 40g	m2 = 240g	m3 = 60g	(i) Temperature of oven is same as hot body.
θ1 = ? c1 = 0.85Jg-1k-1	θ2 = 30°C c2 = 4.2Jg-1k-1	θ2 = 30°c c3 = 0.4Jg-1k-1	(ii) Temperature of calorimeter is same as cold body

Final temperature, θ = 50°C