Question

at what temperature does gases expand?​

Answer 1

Answer:

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The more easily liquefied gases, which exhibit a sensible departure from the law ot Mariotte, are more expansible by heat than air, as will appear by the following table :— Expansion upon 1 volume from 32 to 212 degs.

Answer 2

The expansion by heat in different lorms of matter, is exceedingly various. By being heated from 32 to 212 , 1000 cubic inches of iron become 1004 1000 " water " 1045 1000 " air " 1366 Gases are, therefore, more expansable by heat than matter in the other two conditions ot liquid and solid. The reason is, that the particles of air or gas, far from being under the influence of cohesive attraction, like solids or liquids, are actuated by a powerful repulsion for each other. The addition of heat mightily enhances this repulsive tendency, and causes great dilatation.