question_answer

The heat of combustion of carbon to \[C{{O}_{2}}\] is \[-393.5\,\,kJ/mol\]. The heat released upon the formation of 35.2 g of \[C{{O}_{2}}\] from carbon and oxygen gas is                                                      [NEET 2015 (Re)]

A)  - 315 kJ

B)       + 315 kJ

C)  - 630 kJ           

D)       - 3.15 kJ

Correct Answer: A

Solution :

           

Given,

Heat released on formation of 44 g or 1 mole

Heat released on formation of 35.2 g of