+91-87964 74404
FlagBACK
Question icon
Grade 12th passPhysical Chemistry

calculate the emf of the following cell at 298K
H2+1/2O2=H2O delta G0= -226.8kj/mol
H2O=H++OH- delta G0= 76.2kj/mol

Profile image of ANIMESH
11 Years agoGrade 12th pass
Answers icon

2 Answers

Profile image of Neeraj Joshi
11 Years ago
let us take the frst equation as equation 1 and second as equation 2
Now,
add eq1+2 eq2
H2O + ½ O2 +H2 = 2H+ + 20H-
Then delta G will b 
-226.8+2(76.2)
-74.4kj/mol
as delta G=-nFE
E=-G/nF
E=74400/2*96500
E=0.385Jmol-1
Profile image of ANIMESH
11 Years ago
but the answer is 1.2 volts

Other Related Questions on physical chemistry

question mark
Which of the following aqueous solutions remains neutral after
electrolysis
physical chemistry
0 Answer Available

Last Activity: 3 Years ago

question mark
In the reaction A + 2B ⇌ 2C, if 2 moles of A, 3 moles of B and 2 moles of C are placed in a 2 L flask and
the equilibrium concentration of C is 0.5 mol/L. The equilibrium constant (KC) for the reaction is.....and please tell how you know that the reaction is going forward .. imean how to calculate the reaction quotient ???
 
physical chemistry
1 Answer Available

Last Activity: 3 Years ago

question mark
True or false when an electron in ground state of hydrogen atom is excited with an energy that is greayer than e2-e1 but less than e3-e1 the electron will get excited n=2
physical chemistry
1 Answer Available

Last Activity: 3 Years ago

question mark
18 19 gram mixture of na2co3 and nahco3 on heating gives 2.2 gram CO2 gas find the percent nahco3 (by mass) in mixture
physical chemistry
1 Answer Available

Last Activity: 4 Years ago

question mark
A 100 cm cube solution of sodium carbonate is prepared by dissolving 8.653 g of salt in water the density of solution is 1.0816g per ml what are the molarity and molality of the solution.
 
physical chemistry
1 Answer Available

Last Activity: 4 Years ago