How much heat is needed to heat a 5 ton brick fireplace from 10 to 60 degrees?

To determine the cost of heat for heating a brick fireplace, we use the formula: Q = Ck * m * (t – t0), where CK is the specific heat capacity of the brick (according to the condition CK = 0.84 kJ / (kg * K) = 840 J / ( kg * K)); m is the mass of a brick fireplace (m = 5 t = 5 * 10 ^ 3 kg); t0 – initial temperature (t0 = 10 ºС); t – final temperature (t = 60 ºС).

Let’s perform the calculation: Q = Ck * m * (t – t0) = 840 * 5 * 10 ^ 3 * (60 – 10) = 210 * 10 ^ 6 J = 210 MJ.

Answer: To heat a brick fireplace, you need 210 MJ of heat.