1.

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

Answer»

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

Solution :`C+O_(2)rarrCO_(2)DeltaH=-393.5 kJ//mol`
`because` 44gm of `CO_(2)` FORM by which heat RELEASED `=-393.5 kJ`
`therefore` 1 gm of `CO_(2)` form by which heat released = `-(393.5)/(44)`
`therefore` 35.2 gm (given) of `CO_(2)` form by which heat released
`=-(393.5)/(44)xx35.2=-315 kJ`.


Discussion

No Comment Found

Related InterviewSolutions