the heat of combustion of carbon to `CO_(2) is - 393 . 5 kJ // mol` . The heat released upon formation of 35.2g of `CO_(2)` from carbon and oxygen gas is

Options

A. `+ 315 kJ`
B. `-31 . 5kJ`
C. `-315 kJ`
D. `+ 31.5KJ`

Answer

c

Explanation

`C+O_(2)toCO_(2), DeltaH=-393.5kJ//mol`
heat releaded during the formation of 35.2 g(given) of
`CO_(2)=-(393.5xx35.2)/44=-315 kJ`