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The heat of formation of ethane is -19.4...

The heat of formation of ethane is `-19.46 kcal`. Bond enegries of `H-H, C -H` and `C- C` bonds are `104.18, 99.0` and `80.0 kcal`, respectively. Calculate the heat of atomisation of graphite.

Text Solution

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Equivalent conductance of N/10 NaCl solution
`wedge_(v)=Sp." Conductivitiy "xx "dilution"`
`=0.0092 xx 10,000=92" ohm"^(-1)`
`wedge_(oo)=lambda_(Na^(+))+lambda_(Cl^(-))`
=43.0+65.0=108 `ohm^(-1)`
Degree of dissociation, `alpha=(wedge_(v))/(wedge_(oo))=(92)/(108)=0.85`
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