Slide 1 of 29 © Copyright Pearson Prentice Hall > The Nature of Gases Kinetic Theory and a Model for Gases The word kinetic refers to motion. The ___________ an object has because of its ________ is called __________ ___________. According to the ___________ theory, all ___________ consists of _________ ________ that are in _____________ _____________________. 13.1

Slide 2 of 29 © Copyright Pearson Prentice Hall > The Nature of Gases Kinetic Theory and a Model for Gases According to kinetic theory: The particles in a gas are considered to be small, hard spheres with an _______________ volume. The motion of the particles in a gas is _______, _________ and __________. All collisions between particles in a gas are perfectly __________. 13.1

Slide 3 of 29 © Copyright Pearson Prentice Hall > The Nature of Gases Kinetic Theory and a Model for Gases A. Particles in a gas are in rapid, constant motion B. Gas particles travel in straight-line paths. C. The gas fills the container.

Slide 4 of 29 © Copyright Pearson Prentice Hall > The Nature of Gases Gas Pressure Gas _____________ results from the force exerted by a gas per unit surface area of an object. An empty space with no particles and no pressure is called a _____________. _______________ pressure results from the collisions of atoms and molecules in air with objects. 13.1

© Copyright Pearson Prentice Hall Slide 5 of 29 > The Nature of Gases Gas Pressure Gas pressure is the result of simultaneous ______________ of billions of rapidly moving particles in a gas with an __________. 13.1

Slide 6 of 29 © Copyright Pearson Prentice Hall > The Nature of Gases Gas Pressure A _____________ is a device that is used to measure atmospheric pressure. 13.1

Slide 7 of 29 © Copyright Pearson Prentice Hall > The Nature of Gases Gas Pressure The SI unit of pressure is the _____________ (Pa). One standard atmosphere (atm) is the pressure required to support _______ mm of mercury in a mercury barometer at 25°C. 13.1

© Copyright Pearson Prentice Hall SAMPLE PROBLEM Slide 8 of

Slide 9 of 29 © Copyright Pearson Prentice Hall > The Nature of Gases Kinetic Energy and Temperature Average Kinetic Energy The particles in any collection of atoms or molecules at a given temperature have a ________ ___________ of kinetic energies. Most of the particles have kinetic energies somewhere in the ___________ of this range. 13.1

Slide 10 of 29 © Copyright Pearson Prentice Hall > The Nature of Gases Kinetic Energy and Temperature 13.1

Slide 11 of 29 © Copyright Pearson Prentice Hall > The Nature of Gases Kinetic Energy and Temperature _________ _____________ (0 K, or – °C) is the temperature at which the motion of particles theoretically ceases. Particles would have ___ kinetic energy at absolute zero. Absolute zero has ___________ been produced in the laboratory. 13.1

Slide 12 of 29 © Copyright Pearson Prentice Hall > The Nature of Gases Kinetic Energy and Temperature Average Kinetic Energy and Kelvin Temperature The Kelvin temperature of a substance is _________ ______________ to the average kinetic energy of the particles of the substance. 13.1