Question

directions: read the text properties of matter and then answer the questions below. 1. use context clues or a dictionary to define the following terms: physical property - chemical property - mass - conductivity - malleability - luster - reactivity - flammability - combustibility - toxicity - corrosion - 2. how are intensive and extensive properties different? how are they similar? 3. a spoon made of pure silver has a mass of 15 grams, a volume of 1.43cm³, and a density of 10.49g/cm³. silver is used in spoons because it has no toxicity to humans. silver is a shiny metal which tarnishes (reacts with gases in the air) easily. it has a melting point of 960°c and a boiling point of 2212°c. it is used in jewelry because it is malleable, and it’s used in electrical circuits because it has a high electrical conductivity. silver is not magnetic. a. what are the intensive physical properties of a silver spoon? b. what are the extensive physical properties of a silver spoon? c. what are the chemical properties of a silver spoon? d. which of these properties might be used to identify silver? explain your answer.

Explanation:

Step1: Define terms

Physical property: A characteristic of a substance that can be observed or measured without changing the identity of the substance.
Chemical property: A characteristic of a substance that describes its ability to change into different substances.
Mass: The amount of matter in an object.
Conductivity: The ability of a substance to allow the flow of electricity or heat.
Malleability: The ability of a substance to be hammered or rolled into thin sheets.
Luster: The way a substance reflects light; shiny appearance.
Reactivity: The ability of a substance to undergo a chemical reaction.
Flammability: The ability of a substance to burn.
Combustibility: The quality of being able to burn.
Toxicity: The degree to which a substance is poisonous.
Corrosion: The process by which a metal is attacked by substances in its environment and is gradually changed into new substances.

Step2: Compare intensive and extensive properties

Intensive properties do not depend on the amount of matter present (e.g., density, melting - point, color). Extensive properties depend on the amount of matter present (e.g., mass, volume). They are both properties of matter.

Step3: Identify properties of silver spoon

a. Intensive physical properties: Density (10.49g/cm³), luster (shiny), melting - point (960°C), boiling - point (2212°C), non - magnetic, high electrical conductivity.
b. Extensive physical properties: Mass (15 grams), volume (1.43cm³).
c. Chemical properties: Tarnishes (reacts with gases in the air).
d. Intensive physical properties like density (unique value for silver), melting - point, and luster can be used to identify silver as they are characteristic and do not change with the amount of silver present.

Answer:

1. Physical property: A characteristic of a substance that can be observed or measured without changing the identity of the substance.

Chemical property: A characteristic of a substance that describes its ability to change into different substances.
Mass: The amount of matter in an object.
Conductivity: The ability of a substance to allow the flow of electricity or heat.
Malleability: The ability of a substance to be hammered or rolled into thin sheets.
Luster: The way a substance reflects light; shiny appearance.
Reactivity: The ability of a substance to undergo a chemical reaction.
Flammability: The ability of a substance to burn.
Combustibility: The quality of being able to burn.
Toxicity: The degree to which a substance is poisonous.
Corrosion: The process by which a metal is attacked by substances in its environment and is gradually changed into new substances.

1. Intensive properties do not depend on the amount of matter; extensive properties do. Both are properties of matter.
2. a. Density, luster, melting - point, boiling - point, non - magnetic, high electrical conductivity.

b. Mass, volume.
c. Tarnishes (reacts with gases in the air).
d. Intensive physical properties like density, melting - point, and luster as they are characteristic and independent of amount.