Initial data: m (mass of water) = 15 kg; t (temperature that water must reach) = 308.5 K; t0 (initial water temperature) = 288.5 K.
Reference data: C (specific heat capacity of water) = 4200 J / (kg * K).
The required amount of heat to heat 15 kg of water to a given temperature is calculated by the formula: Q = C * m * (t – t0) = 4200 * 15 * (308.5 – 288.5) = 1 260 000 J = 1.26 * 10 ^ 6 J = 1.26 MJ.
Answer: To heat water, you need 1.26 MJ of heat.
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