How much heat must be spent to heat a cast-iron frying pan weighing 300g from 20’s to 270’s?
| April 16, 2021 | education
m = 300 g = 0.3 kg.
t1 = 20 ° C.
t2 = 270 ° C.
C = 540 J / kg * ° C.
Q -?
The amount of heat Q, which is necessary to heat a cast-iron frying pan, is determined by the formula: Q = C * m * (t2 – t1), where C is the specific heat capacity of the substance from which the frying pan is made, m is the mass of the frying pan, t2, t1 are the final and initial heating temperature.
Q = 540 J / kg * ° C * 0.3 kg * (270 ° C – 20 ° C) = 40500 J.
Answer: to heat a cast-iron frying pan, you need to spend Q = 40500 J of thermal energy.
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