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1. Free Powerpoint Templates
Pressur
e Of
Gases
Kate Shaina C. Baluyut
BEEd 1-3 day

2. Free Powerpoint Templates
Pressure of
Gases•Pressure is determined by
the flow of a mass from a
high pressure region to a
low pressure region.
Pressure measurements are
made on the fluid states-
liquids and gases.

3. Free Powerpoint Templates
What is Pressure?
•Pressure is a force exerted by the
substance per unit area on another
substance. The pressure of a gas is
the force that the gas exerts on the
walls of its container.
•Pressure is a property which
determines the direction in
which mass flows

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Pressure is defined a Force per
unit area. With gases the force
comes from the gas molecules
hitting the side of the container.
Air pressure is measured with
a barometer.

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BAROMETER:
•Pressure is directly measured
with a device called
a barometer.
•Invented by Evangelista
Torricelli (1608-1647), this
mechanism operates similarly
as a balance, using mercury
as the standard weight.

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Boyle's Law
•In 1662 Robert Boyle
made the first systematic
study of the relationship
between volume and
pressure in gases.
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8. Free Powerpoint Templates
•Boyle's law or the pressure-
volume law states that the volume
of a given amount of gas held at
constant temperature varies
inversely with the applied pressure
when the temperature and mass are
constant.
Boyle's Law

9. Free Powerpoint Templates
Pressure and
Boyle's Law
•In the 17th Century, Robert Boyle
first formulated the relationship
among pressure, volume, and
temperature as they related to gas
through the formula:
P1V1=P2V2P1V1=P2V2