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THE NATURE OF GASES SECTION 10.1 After reading Section 10.1, you should know: the three assumptions of the kinetic theory how to convert pressure readings.

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Presentation on theme: "THE NATURE OF GASES SECTION 10.1 After reading Section 10.1, you should know: the three assumptions of the kinetic theory how to convert pressure readings."— Presentation transcript:

1 THE NATURE OF GASES SECTION 10.1 After reading Section 10.1, you should know: the three assumptions of the kinetic theory how to convert pressure readings between atm, kPa and mm Hg how the kinetic theory affects gas pressure

2 Kinetic Theory  Atoms are in constant motion  3 Assumptions of the Kinetic Theory for gases:  No attractive or repulsive forces exist between gas particles  The particles in a gas are in constant, random motion  All collisions are perfectly elastic kinetic energy is transferred from one particle to the next without losing any energy

3 Gas Pressure  The force exerted by a gas per unit of surface area  A vacuum exists if there is no gas particles or pressure  1 atm = 760 mm Hg = 101.3 kPa

4 Gas Pressure  Atmospheric Pressure – force exerted from collisions of air particles with objects  Measured with a barometer

5 Kinetic Energy and Kelvin Temperature  Particles absorb energy, which causes them to move faster  This increase in kinetic energy causes the temperature to rise  At absolute zero (0 Kelvin) the molecules have no kinetic energy and are no longer moving  Kinetic energy and Kelvin temperature are directly related

6 After reading Section 10.1, you should know: the three assumptions of the kinetic theory how to convert pressure readings between atm, kPa and mm Hg how the kinetic theory affects gas pressure


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