Lecture 1 and 2 - Matter

Question 1

Define Matter

Answer 1

Anything that occupies space and has mass.

Question 2

List 3 states of Matter

Answer 2

Solid, liquid and gas.

Question 3

Explain the features of a solid

Answer 3

• Rigid
• Fixed vol and shape.

Question 4

Explain the features of a liquid

Answer 4

• Definite vol
• Assumes shape of container.

Question 5

Explain the features of gas

Answer 5

• No fixed vol or shape
• Takes the shapes and vol of its container

Question 6

Define Physical Properties

Answer 6

Characteristics that are directly observable and unique to a substance.

Question 7

Define Chemical Properties

Answer 7

Characteristics that describe the behaviour of matter.

Question 8

Define pure substances

Answer 8

Fixed composition; cannot be further purified.

Question 9

Define Mixtures

Answer 9

A combination of two or more pure substances.

Question 10

Define Physical Change

Answer 10

Change in one or more physical properties of a substance, not in its chemical composition.

Question 11

Define Chemical Change

Answer 11

A given substance becomes a new substance or substances with dif. properties and dif. composition.

Question 12

Define Elements

Answer 12

Cannot be subdivided by chemical or physical means.

Question 13

Define Compounds

Answer 13

Elements united in fixed ratios.

Question 14

Define Homogenous Matter

Answer 14

Uniform composition throughout.

Question 15

Define Heterogenous Matter

Answer 15

Nonuniform composition.

Question 16

List the Techniques to separate mixtures based on the physical properties of the compound

Answer 16

Dif Physical property
1. Boiling point - Distillation
2. State of Matter (Solid/ liquid/ gas) - filtration
3. Adherence to a surface - chromatography
4. volatility - Evaporation