How much heat is needed to heat the air in the room from 0 – 20 degrees. size 6 * 5 * 4m

To determine the cost of heat for heating air, we will use the formula: Q = Sv * m * (t2 – t1) = Cw * ρ * V * (t2 – t1) = Cw * ρ * a * b * c * (t2 – t1 ).

Constants and variables: Cw – heat capacity of air (Cv = 1005 J / (kg * K)); ρ is the air density (ρ ≈ 1.25 kg / m3); a – the length of the room (a = 6 m); b – width (b = 5 m); c – height (c = 4 m); t2 – end. pace. air (t2 = 20 ºС); t1 – early. pace. (t1 = 0 ºС).

Calculation: Q = 1005 * 1.25 * 6 * 5 * 4 * (20 – 0) = 3.015 * 10 ^ 6 J (3.015 MJ).