How much heat is needed to heat 2 kg of iron by 5 degrees?
| May 14, 2021 | education
Given:
m = 2 kilograms is the mass of iron;
dT = 5 ° Celsius – the temperature to which the iron must be heated;
c = 460 J / (kg * C) – specific heat of iron.
It is required to determine Q (Joule) – how much energy is needed to heat iron.
To determine the amount of energy, you must use the following formula:
Q = c * m * dT;
Q = 460 * 2 * 5 = 460 * 10 = 4600 Joules.
Answer: to heat 2 kilograms of iron, you need to expend energy equal to 4600 Joules (4.6 kJ).
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