1. Pressure Law

2.  At the end of this lesson you should be able
to:
 Determine the relationship between pressure and
temperature at constant volume and mass of gas
 P/T = Constant
 Solves problem involving pressure and
temperature
 Explain absolute zero
 Explain absolute temperature

3.  Have you play table tennis??
 Have you experiences dented (kemek) ball??
 What you do to overcome dented (kemek)
table tennis ball??

4.  Immersed the ping pong ball into hot water.
 And the ping pong ball will return to it
original shape.

5.  When immersed the ping pong ball into hot
water
 The temperature of air inside the ball also
increases
 So, the collision of the molecules to its
container is more frequently
 The force per unit area also known as
pressure are increases

8.  Pressure Law state for constant mass and
volume:
 “Pressure directly proportional to its absolute
temperature”

9.  In mathematical equation:
 P = constant
T
P1 = P2
T1 T2
 So we can conclude:
Must use in Kelvin

10. Pressure
O
-273⁰C 100⁰C ɵ/⁰C

11. Pressure
Now we get!!
V directly proportional to
Absolute Temperature
O
ɵ/K

12.  Absolute Zero temperature can be define as
The lowest possible
temperature that is
-273 ⁰C or 0K

13. ɵ⁰C is equal with (ɵ + 273) K
Example:
What is 310K in Celsius??
37⁰C