thermal properties

Question 1

what is thermal expansion

Answer 1

when a material is heated, the particles have more kinetic energy so move more, resulting in more space between molecules - and ultimately resulting in the material expanding

Question 2

sensitivity

Answer 2

the change in output per unit change in input

Question 3

whatr is sensitivity of a thermometer

Answer 3

the change in length per degree change in temperature

Question 4

how to increase sensitivity of a thermometer

Answer 4

bigger bulb, narrower bore (hollow center part where mercury is)

Question 5

how can range of thermometer be increased?

Answer 5

wider bore, longer stem

Question 6

linearity

Answer 6

when a change in input causes the same (or equivilent) change in output (e.g. 1C produces a 1mm change)

Question 7

internal energy

Answer 7

the energy stored by particles within a system

Question 8

energies stored as internal energy

Answer 8

kinetic and potential

Question 9

what does an increase in internal energy result in

Answer 9

a change of state or an increase in temperature

Question 10

2 types of specific latent heat

Answer 10

fusion (solid and liquid)
vaporisation (liquid and gas)

Question 11

specific latent heat equation

Answer 11

L = E/m
specific latent heat (J/kg) = Energy (J) / mass (kg)