Which of the following correctly explains why the vapor pressure of water has to be included in the calculations?Some of the liquid water evaporates into the gas, and increases the total pressure generated by the trapped gas.As the H2(g) is bubbled up the reaction solution, some of the H2(g) molecules are solubilized by water in the aqueous solution, effectively decreasing the measured pressure above.The pressure contributed by the H2(g) is greater than the measured total pressure because of the contribution of partial pressure of water vapor.The pressure exerted by the evolved H2(g) is reduced because of the co-presence of water vapor, thus Pwater vapor has to be added to Pdry gas. Overview of the experiment: Recap of the ExperimentRecord Volume of thePlace 10.0Cover theenclosed gas, theheight differenceInsert foldedmL of 6.0 Mmouth of theMg ribbon(approx.0.02-0.03 g)Add waterHCI into aeudiometer withto fillbetween the waterfinger and invertinto a glass thatis 2/3 filled w/eudiometereudiometerlevels inside andpartially filledw/ distilledto the brim.into theoutside the eudiometer,eudiometer.and the temperature ofwater.water.the water outside.

In calculation we should have to subtract the vapour pressure of water from measured total pressure.…

Answered: vapor pressure of water

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Which of the following correctly explains why the vapor pressure of water has to be included in the calculations?

Some of the liquid water evaporates into the gas, and increases the total pressure generated by the trapped gas.
As the H₂(g) is bubbled up the reaction solution, some of the H₂(g) molecules are solubilized by water in the aqueous solution, effectively decreasing the measured pressure above.
The pressure contributed by the H₂(g) is greater than the measured total pressure because of the contribution of partial pressure of water vapor.
The pressure exerted by the evolved H₂(g) is reduced because of the co-presence of water vapor, thus P_{water vapor} has to be added to P_{dry gas}.