A manual of physics, theoretical and practical : for medical students / by Hugh C. H. Candy.

  • Candy, Hugh Charles Herbert, 1859-1935
Date:
1918
Catalogue details

Licence: In copyright

Credit: A manual of physics, theoretical and practical : for medical students / by Hugh C. H. Candy. Source: Wellcome Collection.

    195/470 (page 181)
    t° G., and at a pressure y. If it could exist at 0° C. and 760 mm., it would then fill (p. 133) 1 X p X 273 760 X (273 + G litres. , . V y. 273 X 0-804 . and would weigh ^0q ^273 -f t) ^ aqueous vapour at 0° C. and 760 mm. weighs 0-804 grm. The weight of aqueous vapour in a given amount of air can also be determined experimentally by Fig. 121.—Direct determination of weight of H<jueons vapour in air. drawing the air slowly through a weighed U-tube containing strong sulphuric acid, when the increase in weight of the U-tube gives the weight required (Fig. 121). Exercises 1. Explain tlie effect of increase of pressure on the boiling- point of a liquid. Give two examples in which this change of boiling-point is utilized. [First Professional.'] 2. Distinguish between evaporation and ebullition. A sealed glass tube, in the form of an inverted U, contains a small quantity of water in each limb, and v/ater vapour only in the remaining space. One limb is placed in a freezing mixture. Describe- the changes that occur in each part of the tube. [Ihid.]