By how many degrees can 2 kg of hot water cool down, giving off 504 kJ of heat to the surrounding space?
May 3, 2021 | education
| The amount of heat that water gives off to the surrounding space is calculated by the formula:
Q = C * m * ∆t, where Q is the amount of heat released (Q = 504 kJ = 504 * 10³ J) C is the specific heat capacity of water (C = 4200 J / (kg * K)), m is the mass of water (m2 = 2 kg), ∆t is the change in water temperature (ºС).
Let’s calculate the change in water temperature:
∆t = Q / (С * m) = 504 * 10³ / (4200 * 2) = 60 ºС.
Answer: Hot water will be cooled by 60 ºС.
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