MatterSection 2 2-2-1 Physical Properties 〉 Physical properties are characteristics that can be observed without changing the identity of the substance.

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Presentation transcript:

MatterSection Physical Properties 〉 Physical properties are characteristics that can be observed without changing the identity of the substance.

MatterSection Physical Properties, continued Physical properties can help identify substances.

MatterSection Physical Properties, continued Physical properties can be observed or measured.

MatterSection Physical Properties, continued –Examples: shape, color, odor, texture, state, melting point, boiling point, strength, hardness, magnetism, the ability to conduct electricity or heat

MatterSection Physical Properties, continued –melting point: the temperature and pressure at which a solid becomes a liquid

MatterSection Physical Properties, continued –boiling point: the temperature and pressure at which a liquid becomes a gas

MatterSection Physical Properties, continued Physical properties help determine uses.

MatterSection Physical Properties, continued Density is a physical property.

MatterSection Physical Properties, continued –density: the ratio of the mass of a substance to the volume of the substance

MatterSection Physical Properties, continued

MatterSection Physical Properties, continued –common unit of density is g/cm 3

MatterSection Physical Properties, continued Density is different from weight.

MatterSection Math Skills Density If 10.0 cm 3 of ice has a mass of 9.17 g, what is the density of ice?

MatterSection Math Skills 1. List the given and unknown values. Given: mass, m = 9.17 g volume, V = 10.0 cm 3 Unknown: density, D = ? g/cm 3

MatterSection Math Skills, continued 2. Write the equation for density. density = mass/volume, or D = m/V

MatterSection Math Skills, continued 3. Insert the known values into the equation, and solve.

MatterSection 2 Chemical Properties 〉 Why are flammability and reactivity classified as chemical properties?

MatterSection Chemical Properties A chemical property describes how a substance changes into a new substance, either by combining with other elements or by breaking apart into new substances.

MatterSection Chemical Properties, continued Flammability is a chemical property. –flammability: the ability to burn

MatterSection Chemical Properties, continued Reactivity is a chemical property.

MatterSection Chemical Properties, continued –reactivity: the capacity of a substance to combine chemically with another substance

MatterSection Chemical Properties, continued Physical and chemical properties are different.

MatterSection Chemical Properties, continued Physical properties can be observed without changing the identity of a substance.

MatterSection Chemical Properties, continued Chemical properties can be observed only in situations in which the identity of the substance changes.

MatterSection Review Questions Define physical properties.

MatterSection Review Questions What can physical properties be used for?

MatterSection Review Questions List 12 examples of physical properties.

MatterSection Review Questions Define melting point.

MatterSection Review Questions Define boiling point.

MatterSection Review Questions What do physical properties help determine?

MatterSection Review Questions What kind of property is density?

MatterSection Review Questions Define density.

MatterSection Review Questions What is the formula for density?

MatterSection Review Questions What is the common unit for density?

MatterSection Review Questions Density and weight are the same. True or False

MatterSection Review Questions What is the density of a rock that has a mass of 40.0 g and a volume of 10.0 cm 3.?

MatterSection Review Questions What does a chemical property describe?

MatterSection Review Questions List 2 chemical properties.

MatterSection Review Questions Define flamability.

MatterSection Review Questions Define reactivity.

MatterSection Review Questions Chemical and physical properties are different. True or False

MatterSection Review Questions What happens to the identity of a substance when physical properties are observed?

MatterSection Review Questions What happens to the identity of a substance when chemical properties are observed?

MatterSection Review Questions What happens to the identity of a substance when chemical properties are observed?