Measurement of the specific latent heat of vaporisation of water

Label This Diagram

a - steam

b - boiling water

c - heat source

d - steam trap

e - glass tubes

f - steam bubbles

g - calorimeter

h - water

i - insulation

j - lid

k - thermometer

Method • 1

• Measure mass of calorimeter

• Add cold water

Method • 2

• Measure mass of calorimeter + water

• Calculate mass of water

Method • 3

• Measure initial temperature

• Boil water

Method • 4

• Measure final temperature

• Calculate temperature change

Method • 5

• Measure mass of steam + water + calorimeter

• Calculate mass of steam

Write out the formula used for this experiment

m(s) l + m(s) c(w) temp change (s) = m (w) c(w) temp change (c+w) + m(c) c (c) temp change (c+w)

Precautions • 1

Final temperature between initial temperature and 100°C to cancel out heat gain and loss errors

Precautions • 2

Use steam trap to get rid of excess wtaer