How does the vapor pressure of water at 10 c compare with its vapor pressure at 50 c?

Question

Chemistry

Stanley Johnson

20 December, 23:15

How does the vapor pressure of water at 10 c compare with its vapor pressure at 50 c?

+2

Answers (1)

Know the Answer?

Jonathon Shepherd · Answer 1

The vapor pressure of water at 50ºC will be greater than that at 10ºC because of the added energy and thus greater movement of the water molecules. If one knows the ∆Hvap at a given temperature, one can calculate the vapor pressure at another temperature. This uses the Clausius-Clapeyron (sp?) equation. It turns out the vapor pressure of water at 10º is 9.2 mm Hg, and that at 50º is 92.5 mm Hg.