Home
Class 12
CHEMISTRY
Standard free energies of formation (I k...

Standard free energies of formation (I `kJ //`mol ) at `298 K` are ` -237 .2 , - 394 .4` and `- 8.2 ` for `H_2 O(1), CO_2 (g)` and pentange (g) , respectively . The value of `E_(cell)^@` for the pentane-oxygen fuel cell is .

A

1.0968V

B

0.0968

C

1.968V

D

2.0968V

Text Solution

Verified by Experts

The correct Answer is:
C
`C_(5)H_(12)+8O_(2)to5CO_(2)+6H_(2)O`
`DeltaG^(@)=-5xx394.4-6xx237.2+8.2`
`DeltaG^(@)=-nFE_(Cell)^(@)`
`-3387kJ//`mole
Promotional Banner

Similar Questions

Explore conceptually related problems

In a fuel celll, methanol is used as a fuel and O_(2) is used as oxidizer. The standard enthalpy of combustion of methanol is -726 kJ mol^(-1) . The standard free energies of formation of CH_(3)OH(I), CO_(2)(g) and H_(2)O(I) are -166.3, -394.4 and -237.1 kJ mol^(-1) respectively. The standard free energy change of the reaction will be

Calculate the standard free energy change for the reaction, 4NH_(3(g))+5O_(2(g))rarr4NO_((g))+6H_(2)O_((l)) . Given that the standard free energies of formation (Delta_(f)G^(0)) for NH_(3(g)),NO_((g))andH_(2)O_((l)) are - 16.8, + 86.7 and - 237.2 KJ mol^(-1) respectively. Predict the feasiblity of the above reaction at the standard state.