1. H E A T
T R A N S F E
R the study of heat flow
within an object and from
one object to another due
to different temperature.

2. T H R E
E
F O R M
S :

3. 1.RADIATION
Heat energy travels as
electromagnetic waves in
the same manner and
speed as light.

4. 2. CONDUCTION
 Heat energy travels when two
objects at different temperature
are in direct contract with each
other.
 During heat conduction, vibrating
atoms / molecules excite the
atoms or molecules next to them.

5. 3. CONVECTION
 the heat fluids is
transferred to cooler
regions by current.

6. SPECIFIC HEAT
the amount of energy
required to raise the
temperature of 1kg. of a
substance by 1k.

7. J / KG. K =
UNIT OF
MEASURE FOR
SPECIFIC HEAT

8. HEAT / THERMAL
CAPACITY
 the amount of heat required
to raise temperature by 1
degree.

9. FORMULA :
Where:
Q = amount of heat transferred
m = mass
C = specific heat
T = change in temperature

10. How much heat is needed to raise the
temperature of 5kg of water 10 k?
Given:
m = 5kg
C = 4180 J/kg.K
T = 10 K
Q = ?

11. Solution:
Q = mC T
= (5kg)(4180J/kg.k)(10
K)
= 209 000 J

12. • How much energy is lost by 10 kg of
brass if it is cooled from 35 to 25 C?
 38 500 J or about 9200 cal
• It takes 487.5 J to heat 25 grams of
copper from 25 °C to 75 °C. What is the
specific heat in Joules/g·°C?
 c = 0.39 J/g·°C