Gas Law Exercise Page 128
* The definition of the torr. The definition of an atmosphere is 1 atm / 101.325 kPa.
** Bold lettering on a physical quantity indicate a molar quantity, i.e. per mole.
Gas Law Exercises
Do not hand in this work sheet. When you are ready, you will be given an examination
over this material. Complete the examination by yourself and hand it in to receive
credit.
In the following exercise you will need the following constants:
1 atm / 760 torr*R = 0.08206 L atm mol-1 K-1VSTP = 22.4 L mol-1 **
T/K = tEC /EC + 273.15 NA = 6.022 × 1023
Humidity Table:
Temperature in EC versus Water Vapor Pressure in torr
0EC 4.6 torr 10EC 9.2 torr 20EC 17.5 torr
1EC 4.9 torr 11EC 9.8 torr 21EC 18.7 torr
2EC 5.3 torr 12EC 10.5 torr 22EC 19.8 torr
3EC 5.7 torr 13EC 11.2 torr 23EC 21.1 torr
4EC 6.1 torr 14EC 12.0 torr 24EC 22.4 torr
5EC 6.5 torr 15EC 12.8 torr 25EC 23.8 torr
6EC 7.0 torr 16EC 13.6 torr 26EC 25.2 torr
7EC 7.5 torr 17EC 14.5 torr 27EC 26.7 torr
8EC 8.0 torr 18EC 15.5 torr 28EC 28.3 torr
9EC 8.6 torr 19EC 16.5 torr 29EC 30.0 torr
Vapor Pressure of some organic compounds:
Compound Name Temperature EC for the pressures:
1 torr 10 torr 40 torr 100 torr 400 torr 760 torr
Methanol -44.0 -16.2 +5.0 +21.6 +49.9 +64.7
Carbon disulfide -73.9 -44.7 -22.5 -5.1 + 28.0 +46.5
Acetic acid -17.2 +17.5 +43.0 +63.0 +99.0 +118.1
Ethanol -31.3 - 2.3 +19.0 + 34.9 + 63.5 + 78.4
Propanone -59.4 -31.1 - 9.4 + 7.7 + 39.5 + 56.5
1-propanol -15.0 +14.7 +36.4 + 52.8 + 82.0 + 97.8
2-propanol -26.1 + 2.4 +23.8 + 39.5 + 67.8 + 82.5
