Answer:
16.95 grams of this compound must be burn to release 264.90 kJ of heat.
Explanation:
The heat of combustion of a compound = [tex]\Delta H_{comb}=-1160.0 kJ/mol[/tex]
Suppose n moles of compound on combustion gives Q amount of energy
Q = -264.90 kJ
[tex]n\times \Delta H_{comb}=Q[/tex]
[tex]n=\frac{Q}{\Delta H_{comb}}=\frac{-264.90 kJ}{-1160.0 kJ/mol}=0.2284 mol[/tex]
Mass of 0.2284 moles of compound = m
Molar mass of compound = M = 74.23 g/mol
[tex]m=n\times M=0.2284 mol\times 74.23 g/mol=16.95 g[/tex]
16.95 grams of this compound must be burn to release 264.90 kJ of heat.
