Mixtures (Study Guide)

Question 1

Classification of magnetic substances

Answer 1

Can be magnetized and attracted by other magnets (called ferromagnetic substances)

Examples, iron, nickel, colbalt

Question 2

Classification of non magnetic substances

Answer 2

Are not attracted by magnets

Examples, copper, manganese and tin

Question 3

Examples of thermal conductors

Answer 3

Copper
Aluminum

Question 4

Examples of non thermal conductors

Answer 4

Wood
Rubber
Fur

Question 5

When do the repulsive forces between gas particles increse

Answer 5

When the gas is compressed

Question 6

How is pressure exerted in a solid

Answer 6

Exerts a downward force on the surface on which it rests

Question 7

How is pressure exerted in a liquid

Answer 7

Pressure is exerted in all directions on the walls of the corner

Question 8

How is pressure exerted in a gas

Answer 8

Collisons between particles and with the walls of the container, cause internal pressure

Pressure = number of collisions /unit surface area

Question 9

The relationship between temperature and the average kinetic energy

Answer 9

Directly proportional

Question 10

What happens when a substance is heated

Answer 10

The particles gain more energy, move faster and consequently their average kinetic energy increases

At a lower temperature the average kinetic energy of these particles will decrease again

Question 11

What happens when particles have gained sufficient energy

Answer 11

When particles gain enough heat, they overcome intermolecular forces and move apart, leading to a state change. During this process, their potential energy increases while kinetic energy remains constant. Conversely, during cooling, particles lose heat and potential energy, moving closer together, again with kinetic energy staying constant.