A) \[+\,315\,kJ\]
B) \[-\,31.5\,kJ\]
C) \[-315\,kJ\]
D) \[+31.5\,kJ\]
Correct Answer: C
Solution :
\[C+{{O}_{2}}\to C{{O}_{2}}\,\,\Delta H=-393.5\,KJ/mol\] \[\because \] \[44\,gm\] of \[C{{O}_{2}}\] form by which heat released \[=-393.\,5\,kJ\] \[\therefore \] \[1gm\] of \[C{{O}_{2}}\] form by which heat released \[=-\frac{393.5}{44}\] \[\therefore \]\[35.2\,gm\] (given) of \[C{{O}_{2}}\] form by which heat released \[=-\frac{393.5}{44}\times 35.2\] \[=-315\,kJ\]
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