Example 1
Heating 1 kg of water by 10 °C with c ≈ 4,180 J/(kg·K) requires about 41.8 kJ.
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Physics tools › Heat transfer: Q = mcΔT
Mendeleev · Physics
Heat transfer: Q = mcΔT
This relation applies when a substance changes temperature without changing phase and its specific heat capacity can be treated as constant over the interval.
Formula usedQ = mcΔT
Calculate
Heat transfer: Q = mcΔT
What do the symbols mean?
Qheat transferred
mmass
cspecific heat capacity
ΔTtemperature change
Two worked examples
Example 2
For 0.5 kg of aluminium, c ≈ 900 J/(kg·K), and ΔT = 50 K, Q ≈ 22.5 kJ.
Good to knowQ is the energy transferred by heating; a temperature difference has the same numerical size in kelvins and degrees Celsius.