Science Particulate Model of Matter

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Chapter 11: Particulate Model of Matter 11.1 Particulate Model of Matter Particulate Model of Matter suggests that: * All matter is made up of small discrete particles. * The small discrete particles in matter are in constant random motion. It is easier to explain the Particulate model of matter using models. A variety of objects can be used to represent the small discrete particles in matter. 11.2 Particulate Model for Solids, Liquids and Gases A block of ice Solid molecules have a restricted motion = Solid A beaker of boiling water Gas molecules are able to move at extremely high speed = Gas A beaker of warm water liquid molecules have greater mobility = Liquid States of Matter Solid * In solids, the molecules are arranged close together in a regular pattern * Strong attractive intermolecular forces hold the molecules in position so they have definite shape and volume * They can only vibrate in their fixed positions Liquid * In liquids, the molecules are not arranged in a regular pattern and are slightly further apart then those in solids * The attractive intermolecular forces are not very strong. Thus, the molecules are able to move among one another, giving liquids its definite volume but not a definite shape. Gases * In gases, the molecules are widely spaced. Intermolecular forces are negligible * The molecules move about randomly with high speeds, colliding with the walls of the container, occupying any available space. Research on *phase changes for water* Heating curve (Please!!!!!! Research on the internet) Freezing = Phase change as a substance changes to Liquid to Solid Melting = Phase change as a substance changes Solid to Liquid Condensation = Phase change as a substance changes Gas to liquid Vaporization = Phase change as a substance changes Liquid to Gas

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