1.

The heat of combustion of carbon is -393.5 kJ/mol. The heat released upon thee formation of 35.2 g off CO_(2) from, carbon and oxygen gas is

Answer»

`+315kJ`
`-31.5kJ`
`-315kJ`
`+31.5kJ`

Solution :`C+O_(2) to CO_(2),DeltaH=-393.5kJ//mol`
`therefore`Heat released upon the formation of 44 G of `CO_(2)` LTBRGT `=-393.5kJ`
`therefore`Heat released upon the formation of 1 g of `CO_(2)`
`=(-393.5)/(44)kJ`
`therefore`Heat released upon the formation of 35.2 g of `CO_(2)`
`=(-393.5)/(44)xx35.2=-315kJ`


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