Specific heat capacity is a measurement of the amount of heat required to change the temperature of a substance. It is defined as the amount of heat needed to raise the temperature of 1 kilogram of a substance by 1 degree Celsius. Substances with high specific heat capacities, like water, require more heat to change their temperature compared to substances with lower specific heat capacities. The document provides examples of how long it takes different materials to heat up by 1000°C when given the same amount of heat. It also provides the specific heat capacity equation and examples of how to calculate the heat required to change a substance's temperature.

1. specific heat Capacity
What is specific heat

2. specific heat Capacity
If the same amount
of heat is given to
the same mass of
different
substances, what
will happen to their
temperatures?

3. Pb Glass Al Cu Fe
Time to heat from zero to 1000C.
37 s 52 s 60 s 83 s 90 s
1000C 1000C 1000C 1000C 1000C
specific heat capacity
Which substance took the least time to be heated
from zero to 1000C?
Which substance took the longest time to be
heated from zero to 1000C?

4. The specific heat capacity (c) of a
substance is the amount of heat that
must be added or removed from a unit
mass of a substance to change its
temperature by 10.
specific heat capacity
Specific heat capacity is also the thermal
inertia of a substance.

5. Iron and copper balls melt all the way through; others have lesser
heat capacities.
A high specific heat
capacity means a
relatively small change
in temperature for a
given change in internal
energy content.
specific heat capacity

6. SPECIFIC HEAT
Liquid water has a high specific heat compared to the
specific heat of other substances.
A mass of 1 kg of water
requires 4180 J of
energy to increase its
temperature by 1 K.
The same mass of
copper requires only
385 J to increase its
temperature by 1 K.
Other units for c: kJ/kg0C and Btu/lb0F.

7. SPECIFIC HEAT
• Some objects are easier to heat than
others.
• When heat flows into an object, its thermal
energy and temperature increase.
• The amount of the increase in temperature
depends on the size of the object, and on
the material from which the object is made.

8. ;
Q
c Q mc t
m t
  

specific heat CAPACITY
Quantity Variable
Heat energy absorbed/released Q
Specific heat capacity c
Mass m
Temperature T
Q = CΔT

9. 450 g
specific heat example
What quantity of heat is
required to raise the
temperature of 450 grams
of water from 15°C to
85°C?
Given:
m = 450 g
Cwater = 4185 J/kg °C
Ti = 15 °C
Tf = 85 °C

10. specific heat example
Q = mcΔT
= (0.45kg)(4185 J/kg °C)(70 °C)
= (0.45kg)(4185 J/kg °C)(70 °C)
= 131 827.5 J
= 131.8 kJ

11. specific heat example
How much heat must be
removed from 14 lb of
aluminum in order to cool it
from 80 °F to 15 °F?
Given:
m = 14 lb
Caluminum = 0.22 Btu/lb °F
Ti = 80 °F
Tf = 15 °F

12. = (14 lb)(0.22 Btu/lb °F)(-65 °F)
specific heat example
Q = mcΔT
= (14 lb)(0.22 Btu/lb °F)(-65 °F)
= -200 Btu

13. 1. How much energy must be
absorbed by 20.0 g of water to
increase its temperature from
283.0 ⁰C to 303.0 ⁰C ? Use the
specific heat of water in Joules.
2. If it takes 41.72 J to heat a
piece of gold weighing 18.69 g
from 10.0 ⁰C to 27.0 ⁰C. What
is the specific heat of gold in
J/kg ⁰C?
specific heat example

14. CLOSING TASK
• You are in charge of developing a tattoo to allow the
world to know about “Specific Heat Capacity”
• The center of the tattoo must be the equation
• The surrounding artwork (minimum of 4 colors) must
demonstrate the equation’s concept in a real-life
situation.
• The artwork must be suitable for all ages and appropriate
for viewing in all social situations
• A 5 sentence paragraph explaining how the artwork
represents the equation or “Specific Heat Capacity”