Cornelsen Experimenta 31799, Описание эксперимента/Руководство пользователя

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Heat
66
1 Experiments
1.2 Experiment 1
Heating and cooling water
Fill the Erlenmeyer flask to the brim with (coloured) water. The rubber stop-
per is then inserted in the flask. The glass tube is inserted in the hole in the
stopper, which causes the water to rise in the glass tube. The level of the
liquid in the tube is marked using the blue plastic peg.
Now place the flask, filled with water, on the bridge-shaped stand and heat
it using a candle in a metal holder. As it is heated the level of the water in the
tube rises, because its volume is increasing. The new water level is marked
with a red peg.
To cool the flask, place it in the plastic beaker, which should be filled with
cold water, and possibly ice cubes as well.
Materials: 1 glass tube (1)
1 candle in metal holder (3)
1 food colouring (7)
1 plastic beaker (9)
1 Erlenmeyer flask (10)
1 peg, red (12)
1 peg, blue (12)
1 rubber stopper (18)
1 bridge-shaped stand (19)
Additionally: 1 thermos flask containing cold water or ice cubes
1.3 Experiment 2
Heating and cooling methylated spirits (inflammable!!)
The Erlenmeyer flask is filled to the brim with coloured methylated spirits.
Then the rubber stopper is inserted in the flask. The glass tube is inserted
in the stopper.
Because methylated spirits is inflammable for heating the spirits we
do not
use any candles . Instead a beaker filled with hot water is placed in the
insulating case.
Then the Erlenmeyer flask with rubber stopper and glass tube is placed in the
plastic beaker. As it expands the methylated spirits rises up the glass tube.
When it cools the level falls again. When heated, methylated spirits expands
more than water.
Materials: 1 glass tube (1)
1 food colouring (7)
1 insulating case (8)
1 plastic beaker (9)
1 Erlenmeyer flask (10)
1 rubber stopper (18)
Additionally: 1 thermos flask containing hot water (70 °C), 1 thermos flask
containing cold water or ice cubes, methylated spirits