1.

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

Answer»

`+135` kJ
`-31.5` kJ
`-315` kJ
`+31.5` kJ

Solution :`C+O_(2)to CO_(2)`
`DeltaH=-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 1 g of
`CO_(2)=(-393.5)/(44)xx35.2`
`~~-315kJ`


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