Write the balanced chemical equation for the complete combustion of each of the following compounds:
b. cyclopropane

Question

Write the balanced chemical equation for the complete combustion of each of the following compounds:

b. cyclopropane

Accepted Answer

Hi, everybody. Here's your next question. Which of the following is the balanced chemical equation for the complete combustion of cy butane. And we have four different answer choices with four different possible equations. So we'll evaluate them after we figure out what we think it is. So first, we need the molecular formula of the compound being combusted. So we're told it's cyclo butane. So we have a four carbon ring which actually doesn't look like a ring but a square and we need to figure out. So we have four carbons, there's no substitute groups. So we have C subscript four. And then because we have a ring here, each of these carbons will have two hydrogen atoms on it since it has two bonds, two other carbons. So four carbons times two, we have H subscript eight C 4h 8 is our molecular formula. So let's look at our equations here to see if we can eliminate any with that knowledge. So when we look at choice A, it has C 4h 10. So that's not going to be correct. So choice A will not be our answer. Choice B has C 4h 8 as the molecular formula. So B is OK. Choice C is C 4h 10. It's also incorrect. And then choice D is C 4h 8. So that's a possibility. So we're down to two choices here. Now, let's write out our equation without any coefficients. So we know we have C 4h 8, it has fewer than five carbons. So we expect it to be a gas. And actually we didn't even have to figure that out because our answer choices all indicated it was a gas. Then plus and when we combust something, the reactant is oxygen gas. So +02 gas or I've left a space for us to fill in coefficients as we balance our equation than a single arrow. Since this is a complete combustion, our products here will be water. So a space and H2O gas plus carbon dioxide. So another space and co two gas. So when we're balancing a combustion reaction, our first step is to balance the carbon atoms. So on the left, our hydrocarbon has four carbons. On the right, we have CO2, it just has one. So if we put a four in front of that carbon dioxide, we give each side four carbons. And our second step is to balance the hydrogen atoms on the left, we have just our hydrocarbon which has eight hydrogens on the right are water molecule which has two hydrogens. So if we put a four in front of water, we have eight hydrogens on each side third step, balance our oxygen on the left, two oxygen atoms per molecule. On the right, we have oxygen coming from water and carbon dioxide. So given the coefficients that are already there, we have four oxygen atoms from the water and eight oxygen atoms from the carbon dioxide giving us a total of 12 oxygens on the right. So when we look on the left, if we put a coefficient of six in front of our 02, that gives us 12 oxygen atoms on the left, I'm just going to erase my oxygen math there. And then the last step in balancing is if necessary, eliminate any fractional coefficients. Sometimes when you balance the oxygen, you end up having to have a coefficient, that's a fraction. But in this case, we do not. So we don't need to do anything further. We have our balanced equation. We have C 4h 8 no coefficient. So we actually can go ahead and eliminate choice B which shows two C 4h 8. So with just that first one, we already have only one answer. Choice left. Choice D which correctly has C 4h 8 no coefficient. Then we have plus 6 +02 gas which is there in joy becomes 4 h2o gas plus four co two gas all found in choice B. So we have our balanced chemical equation for the complete combustion of cyclo butane choice D C 4h 8 gas plus 6 +02 gas becomes 4 h2o gas plus 4 CO2 gas. See you in the next video.

Write the balanced chemical equation for the complete combustion of each of the following compounds:
b. cyclopropane

Verified video answer for a similar problem:

Key Concepts

Combustion Reaction

Balanced Chemical Equation

Cyclopropane

Write the balanced chemical equation for the complete combustion of each of the following compounds:b. cyclopropane

Verified video answer for a similar problem:

Key Concepts

Combustion Reaction

Balanced Chemical Equation

Cyclopropane

Write the balanced chemical equation for the complete combustion of each of the following compounds:
b. cyclopropane