2. Specific heat capacity
Temperature required to raise the
temperature of a unit mass 1kg of a
substance through 1 degree rise in
temperature.
Q (quantity of heat) α m ( θ2 – θ1)
Q = c m ( θ2 – θ1)
c is a constant = specific heat capacity; m is
mass
c = Q/ m ( θ2 – θ1) meeasured in JKg-1K-1
3. Heat capacity C
Quantity of heat required to raise the
temperature of the entire body through 1
degree rise in temperature (1K)
Unit = JK-1
C = mc
= mass x specific heat capacity
4. Methods
Method of mixtures
Electrical method
From the method of mixtures
C = mc cc (θf – θ1) + mw cw (θf – θ1)
mp (θ2 – θf)
5. Electrical method
Solid
c = Ivt
m (θ2 – θ1)
Liquid
c = IVt – mc cc (θ2 – θ1)
m1 (θ2 – θ1)
6. Latent heat of fusion
Heat energy required to convert a substance
from its solid form to its liquid form without
change in temperature
7. Specific latent heat of fusion
Quantity of heat required to change a unit
mass of a substance from solid to liquid
without change in temperature
Q = m x ζ
ζ = Q/m
