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CRS Question, 5–7
QUESTION
(continued)
1. At –273°C all gases occupy nearly the same volume; the different
slopes are because of difference in molar masses.
2. At zero Celsius the gases have different volumes because
the larger the molecule, the larger the volume.
3. Since the pressure is constant, the only difference
that could cause the different slopes is in the number of
moles of gas present in each sample. For
example, the N2O sample must have the fewest moles.
4. Although it does appear to do so, the volumes do not
reach zero but if the graph used K instead of °C the volume would reach
zero for all the gases.