How much joules of heat are given out when a pi - 779 - JAMB Physics 2024 Question
How much joules of heat are given out when a piece of iron, of mass 60g and specific heat capacity 460JKg(^{-1})K(^{-1}), cools from 75ºC to 35ºC
A
1000J
B
1050J
C
1067J
D
1104J
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Correct Option: D
Here's how to solve the problem:
-
Identify the formula: The heat energy (Q) released or absorbed is calculated using the formula: Q = mcΔT where:
- m = mass of the substance
- c = specific heat capacity
- ΔT = change in temperature (Tfinal - Tinitial)
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Convert units if necessary:
- Mass (m) is given in grams (g), but the specific heat capacity is in kg. Convert the mass to kilograms: m = 60g = 60/1000 kg = 0.06 kg
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Identify the values:
- m = 0.0
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