What happens to alkenes and alkanes in a combustion test?
I dont reallly understand ur answer but ill just say as much as i can.firstly, alkanes and alkenes can be distinguished by the addition of bromine water which turns from brown to colorless in an unsaturated hydrocarbon such as alkene. This is because bromine water reacts with unsaturated compounds with quite ease to form bromo-alkane for e.g ethene will change into di-bromo ethane and with nothing else being created. In a combustion test,on the other hand, alkanes react with oyygen to form carbon dioxide and steam and heat is evolved. alkenes react with oxygen to form carbon MONOoxide and steam.
