Experiment Description

Experiment

Experiment B04    Boiling

Objectives
  • Measure the specific latent heat of vaporization of water using the method of mixture
  • Determine if there is difference in temperature between the boiling salt water and the steam
  • Determine the ratio of average separation between molecules in liquid state and gaseous state
Description
In this activity, you will measure the specific latent heat (slh) of vaporization of water. You will also appreciate the dramatical increase in volume during boiling.

In Experiment 1, you will measure the b.p. of salt water and compare it with the temperature of the steam.

In Experiment 2, you will produce steam by heating water with a busen burner. The steam will be condensed in a water bath. The energy involved is obtained from the rise in temperature of the water.

In Experiment 3, you will study the volume expansion of hexane during boiling.
Apparatus
250 ml flat-bottom glass flask [2]
stopper with one short glass tube and a thermometer [1]
stopper with one long glass tube and a thermometer [1]
syringe [1]
calorimeter in an insulated jacket [1]
thermometer [2]
triple-beam balance [1]
hexane [1 bottle]
500 ml measuring cylinder [1]
salt [5 g]
stand-and-clamp [2]
bunsen burner [1]
heat protecting glove [1 pair]
pentane, toluene [1 bottle each]
Experiment