Draw up the equations of reactions characterizing the chemical properties of n-butane

A hydrocarbon belonging to the class of alkanes n-butane, molecular formula C4H10. Gaseous butane is found in natural gas. In its molecule there are strong C – C, C – H bonds, their name is “sigma”. Chemical reactions of butane are due to the breaking of bonds.
1.C4H10 + Br2 = C4H9Br + HBr – substitution reaction;
2. С4Н10 = Н2 + С4Н8 – dehydrogenation reaction;
3. C4H10 = C2H6 + C2H4 – butane splitting;
4. 2С4Н10 + 5О2 = 4СН3СООН + 2Н2О – oxidation;
5. 2С4Н10 + 26О2 = 8СО2 + 10Н2О – combustion reaction.