(3) At 825mm?
(4) At 200mm?
(5) Compute the volume of a gas at 70 degrees, which at 30 degrees is 150cc.
(6) At 0 degrees I have 3000cc.of O. What volume will it occupy at 100 degrees?
(7) I fill a flask holding 2 litres with H. The thermometer indicates 26 degrees, the barometer 762mm. What is the volume of the gas at 0 degrees and 760mm?
If the volumes of gases vary as above, it is evident that their vapor densities must vary inversely. A liter of H at 0 degrees weighs 0.0896. What will a liter of H weigh at 273 degrees? At 273 degrees the one liter has be- come two liters, one of which weighs 0.0448 (= 0.0896 / 2). The vapor density of a gas is inversely proportional to the temperature. Also, the vapor density is directly proportional to the pressure, since a liter of any gas under a pressure of one atmosphere is reduced to half a liter under two atmospheres.
PROBLEMS.
(1) Find the weight of a liter of O at 0 degrees; then compute the weight of a liter at 27 degrees.
(2) Find the weight of 500cc.of N2O at 60 degrees.
(3) Of 200 cc. of CO at -5 degrees.