Balancing the burning of butane

Take a look at an equation showing the burning of butane, a hydrocarbon, with excess oxygen available. (This is the reaction that takes place when you light a butane lighter.) The unbalanced reaction is

C₄H_10(g) + O_2(g) → CO_2(g) + H₂O_(g)

Because waiting until the end to balance hydrogen atoms and oxygen atoms is always a good idea, balance the carbon atoms first. You have four carbon atoms on the left and one carbon atom on the right, so add a coefficient of 4 in front of the carbon dioxide:

C₄H_10(g) + O_2(g) → 4CO_2(g) + H₂O_(g)

Balance the hydrogen atoms next. You have ten hydrogen atoms on the left and two hydrogen atoms on the right, so use a coefficient of 5 in front of the water on the right:

C₄H_10(g) + O_2(g) → 4CO_2(g) + 5H₂O_(g)

Now work on balancing the oxygen atoms. You have two oxygen atoms on the left and a total of thirteen oxygen atoms on the right [(4 × 2) + (5 × 1) = 13]. What can you multiply 2 by to equal 13? How about 6.5?

C₄H_10(g) + 6.5O_2(g) → 4CO_2(g) + 5H₂O_(g)

But you’re not done. You want the lowest whole-number ratio of coefficients. Multiply the entire equation by 2 to generate whole numbers:

[C₄H_10(g) + 6.5O_2(g) → 4CO_2(g) + 5H₂O_(g)] × 2

Multiply every coefficient by 2 (don’t touch the subscripts!) to get

2 C₄H_10(g) + 13O_2(g) → 8CO_2(g) + 10 H₂O_(g)

If you check the atom count on both sides of the equation, you find that the equation is balanced, and the coefficients are in the lowest whole-number ratio.

After balancing an equation, make sure that the same number of each atom is on both sides and that the coefficients are in the lowest whole-number ratio.

مواضيع ذات صلة

التفاعل مع اصباغ الازو

تفاعل الجالكونات مع البروم

تفاعل الجالكونات مع الهكسانون الحلقي

تفاعل الجالكونات مع اليوريا ومعوضاته

تفاعل الجالكونات مع البيروكسيدات

تفاعل الجالكون مع الهيدرازين والفنيل هيدرازين

مركبات الجالكون Chalcone Compounds

تفاعل إضافة مايكل

الاضافة الالكتروفيلية الى مركبات الكاربونيل ألفا – بيتا غير المشبعة

تفاعلات تكاثف مركبات الكاربونيل

تحضير مركبات الكاربونيل ألفا – بيتا غيرالمشبعة

مركبات الكاربونيل ألفا – بيتا غير المشبعة