Chemistry 1.3 Flashcards

Questions and Answers

Classify the condensation of steam:

Both

Physical (correct)

Neither

Chemical

Classify the burning of gasoline:

Physical

Both

Neither

Chemical (correct)

Classify the souring of milk:

Chemical (correct)

Neither

Both

Physical

Classify the dissolving of sugar in water:

Physical Signup and view all the answers

Classify the melting of gold:

Physical Signup and view all the answers

Is the change in volume of a sample of oxygen gas from 10 mL to 11 mL a chemical or physical change?

Physical Signup and view all the answers

What is the difference between extensive properties and intensive properties?

Extensive properties depend on the amount of matter, while intensive properties are the same regardless of the amount. Signup and view all the answers

Why is density an intensive property?

Density is the ratio of mass to volume, which cancel the dependence on amount. Signup and view all the answers

Define chemical change.

A change producing a different kind of matter from the original. Signup and view all the answers

Define chemical property.

Behavior related to the change of one kind of matter into another. Signup and view all the answers

Define extensive property.

A property that depends on the amount of substance. Signup and view all the answers

Define intensive property.

A property that is independent of the amount of substance. Signup and view all the answers

Define physical change.

A change in the state or properties of matter that does not involve a change in its chemical composition. Signup and view all the answers

Define physical property.

A characteristic of matter not associated with any change in chemical composition. Signup and view all the answers

Study Notes

Changes in Matter

Changes can be classified as either physical or chemical.
Physical Changes: Do not alter the chemical composition of a substance.
- Examples: condensation of steam, dissolving sugar in water, melting of gold.
Chemical Changes: Result in the formation of new substances.
- Examples: burning of gasoline, souring of milk.

Volume and Changes

Changes in gas volume, like oxygen gas changing from 10 mL to 11 mL, signify a physical change, not a chemical one.

Properties of Matter

Extensive Properties: Depend on the amount of substance present.
- Example: mass and volume.
Intensive Properties: Remain constant regardless of the amount of substance.
- Example: density, defined as mass divided by volume.

Density as an Intensive Property

Density is an intensive property because it is a ratio (mass/volume) of two extensive properties.
The ratio cancels the dependence on the amount, yielding a constant value for density.

Definitions of Changes and Properties

Chemical Change: Produces a different kind of matter from the original.
Chemical Property: Describes how a substance can change into different matter.
Extensive Property: A characteristic that varies with the amount of substance.
Intensive Property: A characteristic that does not change with the amount of substance.
Physical Change: Alters the state or properties of matter without changing its chemical composition.
Physical Property: A characteristic that doesn't involve a change in the chemical composition.

Description

Test your knowledge on physical and chemical changes with these flashcards. Categorize various changes such as condensation and burning of gasoline, and understand their definitions. Perfect for reinforcing concepts in Chemistry Chapter 1.3.