Detailed answers please

Asked by g_archanasharma | 20th Feb, 2019, 05:23: PM

Expert Answer:

Option (2) is correct.
 
 
Combustion of carbon:
 
straight C space space plus space space straight O subscript 2 space rightwards arrow space CO subscript 2 space space space space space increment straight H subscript 1 space equals space minus 394 space kJ divided by mol

Combustion space of space Carnon space monoxide colon

CO space space plus space bevelled 1 half straight O subscript 2 space rightwards arrow space CO subscript 2 space space space increment straight H subscript 2 space equals space minus 285 space kJ divided by mol


Formation space of space carbon space monoxide colon

straight C space plus space bevelled 1 half straight O subscript 2 space space space rightwards arrow space CO space space space increment straight H space equals ?

increment straight H space equals space increment straight H subscript 1 space minus increment straight H subscript 2 space

space space space space space space space equals space minus 394 space minus open parentheses negative 285 close parentheses

increment straight H space space equals open parentheses negative 109 close parentheses space kJ divided by mol
 
The heat of formation of CO is -109 kJ/mol.

Answered by Varsha | 21st Feb, 2019, 11:16: AM

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