Calculate the amount of heat required to heat 1 cubic meter of sand to 60 degrees Celsius.

These tasks: V (volume of sand that needs to be heated) = 1 m3; Δt (required change in sand temperature) = 60 ºС.
Reference values: ρp (dry sand density) = 1200 … 1700 kg / m3 (let us assume ρp = 1450 kg / m3); Cn (specific heat capacity of sand) = 835 J / (kg * K).
The heat for heating 1 m3 of sand is determined by the formula: Q = Cp * m * Δt = Cp * ρp * V * Δt.
Let’s perform the calculation: Q = 835 * 1450 * 1 * 60 = 72 645 000 J ≈ 73 MJ.
Answer: To heat 1 m3, 73 MJ of heat is required.