States Of Matter

Question 1

Since particles are always moving, what do they have?

Answer 1

Kinetic energy

Question 2

At what temperature do particles cease having kinetic energy?

Answer 2

-273C,absolute zero

Question 3

What is the spreading out of particles named?

Answer 3

Diffusion

Question 4

In what states of matter does diffusion occur?

Answer 4

Gas and liquid

Question 5

For the diffuse of gases experiment, ammonia and hydrogen chloride form what when they meet?

Answer 5

Solid ammonium chloride

Question 6

In which way does diffusion occur?

Answer 6

High to low concentration

Question 7

What affects the speed of diffusion?

Answer 7

Mass of gas/liquid

Question 8

Is air a mixture, compound, or element?

Answer 8

Mixture

Question 9

What causes a solid to melt?

Answer 9

The particles gain enough kinetic energy to overcome the weak intermolecular forces of attraction, this breaks the lattice structure

Question 10

Why does the temperatures for a solid not increase when it is melting?

Answer 10

All of the energy is being used to break the bonds (between molecules)

Question 11

What keeps solids and liquids in a relatively tight formation?

Answer 11

Weak intermolecular forces of attraction between molecules

Question 12

What is evaporation?

Answer 12

Particles gaining enough energy to leave the surface of the liquid and form a vapour

Question 13

What is boiling?

Answer 13

Gas bubbles forming at the body of the liquid

Question 14

What is the boiling and melting point of a pure substance?

Answer 14

A fixed temperature under constant air pressure

Question 15

Describe the movements of a solid particles

Answer 15

They vibrate on a fixed point

Question 16

What is it called when a solid changes directly into a gas?

Answer 16

Subliming

Question 17

Why does the temperature remain constant when freezing occurs?

Answer 17

As the process gives off heat, in order to create bonds which balances the temperature causing it to freeze

Question 18

Do impurities in a liquid cause it to boil at a lower or higher temperature than the pure liquid?

Answer 18

Lower

Question 19

What happens to most liquids when they are heated?

Answer 19

Expansion

Question 20

Is H2 an element or a molecule?

Answer 20

Both

Question 21

Describe the way which gas particles move

Answer 21

High to low concentration in a random way

Question 22

Is the dissolving of a salt in water a chemical reaction?

Answer 22

No