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Blazing goIITian

Joined:	11 Jan 2007
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18 Feb 2007 19:48:07 IST

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573

A SALUTE WAITIN FOR U!!!!!!!

None

hi frnds

ans tis pls

the partial pressureof ethane over a saturated solution contianing 0.0656g of ethane is 1 bar . if the solution contians

0.005g of ethane , wat shall b de partial pressure of dee gas

PLS ANS IT

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Aditya Arora

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18 Feb 2007 23:15:59 IST

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Shipra, were number of moles of water also given.

shipra bhardwaj

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19 Feb 2007 17:20:56 IST

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hi aditya!!

no its not given

shipra bhardwaj

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19 Feb 2007 17:35:34 IST

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hi guys pls helpppppppppp

solve tis plssssssss

youtune

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19 Feb 2007 23:17:44 IST

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Hi!!! shipra,

Here is the solution for the problem you have posted I think it is correct:

Many of us will approach the problem with Raoult?s Law. Here is a word of caution Raoult?s only holds for liquid mixtures and it is limiting law which is to say that it is only applicable when the interaction between insolvent and the solute molecules is the same. Many textbooks do not mention these two things.

Therefore in this problem it is essential to use Dalton?s law.

P_ethane = 1 bar

P(water vapour) = 17..54mm Hg at 20 degree centigrade

Since 1 bar corresponds to 0.0656g

X bar corresponds to 0.005g

The vapour pressure of ethanol is 0.076 bar

hope that is correct

shipra bhardwaj

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20 Feb 2007 00:38:37 IST

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hi prabhat

ya tat was also my approach but i wanna to know how to convert bar int g /mol

youtune

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20 Feb 2007 12:44:10 IST

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hey you connect units of pressure into g/mol

youtune

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20 Feb 2007 12:46:16 IST

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my answer is correct

Bipin Dubey

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Joined: 23 Jan 2007

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24 Feb 2007 12:11:47 IST

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Rao Prabhat is exactly right.

In case of mixture of gases Dalton's law of partial pressure should be applied.

Best Wishes

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