Question #76203
When al kane undergoes combustion must the equation be ballanced
Expert's answer
1. When alkane is heated in the presence of sufficient air or dioxygen it forms carbon dioxide and water and enormous amount of heat energy is released. For example:
CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (l); ∆cHΘ = – 890 kJ mol-1
C4H10 + 13/2 O2(g) → 4CO2 (g) + 5H2O (l); ∆cHΘ = – 2875.84 kJ mol-1
The above reaction can be generalised as follows:
CnH2n+2 + ((3n+1)/2) O2 → nCO2 + (n+1) H2O
Alkanes can also be used as a fuel, as they produce large amounts of heat.
CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (l); ∆cHΘ = – 890 kJ mol-1
C4H10 + 13/2 O2(g) → 4CO2 (g) + 5H2O (l); ∆cHΘ = – 2875.84 kJ mol-1
The above reaction can be generalised as follows:
CnH2n+2 + ((3n+1)/2) O2 → nCO2 + (n+1) H2O
Alkanes can also be used as a fuel, as they produce large amounts of heat.
Learn more about our help with Assignments: Organic Chemistry
