870cc of moist hydrogen measured at 9c and 659mm ppressure. find the volume of dry hydrogen at ntp. the vapour pressure of water t 9c is 9mm. 

Asked by rgkgmu | 26th Sep, 2015, 06:46: PM

Expert Answer:

Given: 870cc of moist hydrogen measured at 90C and 659 mm pressure. 
 
To Find: the volume of dry hydrogen at NTP
 
Solution:
By Using Dalton's Law;
Ptotal = Pdry hydrogen + Pwater
659  =  Pdry hydrogen +  9
Therefore, Pdry hydrogen = 650 mm
Let P1, V1 be the pressure and volume of the dry hydrogen respectively at temperatitr T1.
Let P2, V2 be the pressure and volume of the dry hydrogen respectively at temperatitr T2.
 
Let us calculate the volume V2 of dry hydrogen at NTP.
Using combined gas equation, we get,
begin mathsize 11px style fraction numerator straight P subscript 1 straight V subscript 1 over denominator straight T subscript 1 end fraction space equals space fraction numerator straight P subscript 2 straight V subscript 2 over denominator straight T subscript 2 end fraction fraction numerator 650 space cross times space 870 over denominator 282 end fraction space equals space fraction numerator 760 space cross times space straight V subscript 2 over denominator 273 end fraction rightwards double arrow space straight V subscript 2 space equals space 720.33 space cc end style 
 

Answered by Hanisha Vyas | 26th Sep, 2015, 09:08: PM

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