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Grade: 11
         Equal weights of ethane and hydrogen are mixed in an empty container at 25°C. the fraction of the total pressure exerted by hydrogen is

a. 1 : 2
b. 1 : 1
c. 1 : 16
d. 15 : 16
5 years ago

Answers : (2)

Kevin Nash
askIITians Faculty
332 Points
							Sol. Let x g of each gas is mixed.
Mole of ethane = x/30
Mole of hydrogen = x/2
Mole fraction of hydrogen = (x/2)/(x/2  +  x/30)  =  15/16
⇒ (Partical pressure of H_2)/(Total pressure) = mole fraction of hydrogen
= 15 : 16

						
5 years ago
Nutan Raj
15 Points
							
given,equal wt of ethane& hydrogen are mixed in an empty container at 25 degree celcius.
Initial gram wt of C2H6=wg
Initial gram wt of H2=wg
No of moles of C2H6=w÷30
No of moles of H2=w÷2
According to Henry law
PH2/Ptotal=XH2=nH2/nH2+nC2H6=w/2÷w/2+w/30
PH2/Ptotal=15/16
6 months ago
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