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Enthalpy of combustion of carbon to CO2 ...

Enthalpy of combustion of carbon to `CO_2` is `-393.5 kJ mol^(-1)`
Calculate the heat released upon formation of 35.2 g of `CO_2` from carbon and dioxygen gas.

A

`-630kJ`

B

`-3.15kJ`

C

`-315kJ`

D

`+315kJ`

Text Solution

Verified by Experts

The correct Answer is:
C
`C+O_(2)toCO_(2),DeltaH=-393.3kJ//mol`
44g `CO_(2)` then heat evolved is 393.5 kJ when ltBrgt 35.2g then heat evolved is `(393.5)/(44)xx35.2`
=-315 kJ
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