P6-molecules and matter

Question 1

Internal energy

Answer 1

Total energy of the particles of a substance due to its individual motion (kinetic energy) and positions (potential energy) relative to each other

Question 2

Specific latent heat

Answer 2

The amount of energy needed to change the state of 1kg of a substance (vaporisation=this definition from liquid-gas)(fusion=this definition from solid-liquid)

Question 3

Lf (J/kg specific latent heat of fusion) =

Answer 3

M (mass kg)

Question 4

Lv (specific latent heat of vaporisation J/Kg)

Answer 4

M (mass kg)

Question 5

What is the kinetic theory of matter

Answer 5

Matter is composed of a large number of small particles that are in constant motion

Question 6

Gas pressure is caused by

Answer 6

The random collisions of particles against any surface

Question 7

Density (kg/m3)

Answer 7

Volume (m3)

Question 8

1 m3=

Answer 8

1,000,000cm3

Question 9

Objects that have a lower density than water

Answer 9

(i.e.greater than 1000kg/m3)float in water

Question 10

States of matter solids:

Answer 10

Fixed shape
Fixed volume
Highest density

Question 11

States of matter liquids

Answer 11

Fixed volume
Can be poured
High density more than gas

Question 12

States of matter gases

Answer 12

Highest compressibility
No fixed volume
Particles are far apart
Fills the entire space it is put into
Lowest density

Question 13

What does the smoke cell experiment support

Answer 13

It is evidence to support the ‘kinetic theory of matter’ browning motion