The time periods during the drying process are recorded as well as the lengths of the wire to be removed.
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Materials
Wetted Multifiber 6 ( 5 cm x 5 cm) of experiment 1, dry Multifiber 6 ( 5 cm x 5 cm), Egyptian two pan scale, insulated copper wire (D 0.6 mm), chequered paper, pen, scissors, alarm clock.
Experiment
1. Place the wet Multifiber 6 on the left pan of the scale and a dry one on the right pan.
2. Balance the scale by adding piece of dry Multifiber 6 and of insulated copper wire on the right pan (Fig. 1).
3. Start the alarm clock (Fig. 1: 12.05), remove pieces of wire as soon as the scale is clearly unbalanced (Fig. 2: 12.10).
4. Fix the pieces of wire removed for re-balancing the scale on a chequered paper. Write down the times needed for evaporation.
Observations
1. After 5 minutes a slight loss of weight can be seen (Fig. 2)
2. After 115 more minutes the rest of the wire can be removed (Fig.3). The drying process is finished, the two Multifibers have the same weight.
3. The following changes in weight can be measured after 13 / 29 / 50 / 65 / 80 / 120 minutes (Fig. 4):
4. 3.9 cm / 9.4 (3.9+5.5) cm / 17.2 (9.4 + 7.8) cm / 21.8 (17.2 + 4.6) cm / 26.8 (21.8 + 5.0) cm / 32.4 (26.8 + 5.6) cm.
Explanation
The wet Multifiber 6 had adsorbed water in an equivalent of 32 cm wire (see next experiment).
The water evaporated. Evaluation of the drying of multifiber 6 experiment
Plot a graph showing the loss of water [cm of wire] versus time.