Download the App!
Get 24/7 study help with the Numerade app for iOS and Android! Enter your email for an invite.
From a thermochemical point of view, explain why a carbon dioxide fire extinguisher or water should not be used on a magnesium fire.
Get the answer to your homework problem.
Try Numerade free for 7 days
Thus they will produce more heat instead of extinguishing it.
University of Kentucky
In chemistry, a chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Both reactants and products are involved in the chemical reactions.
In chemistry, energy is what is required to bring about a chemical reaction. The total energy of a system is the sum of the potential energy of its constituent particles and the kinetic energy of these particles. Chemical energy, also called bond energy, is the potential energy stored in the chemical bonds of a substance. Chemical energy is released when a bond is broken during chemical reactions.
Why do you think you can e…
Carbon dioxide is used for…
Explain why it is importan…
Because magnesium reacts w…
Explain why you do not hav…
Although the combustion of…
Explain why heat of combus…
What is a combustion react…
how to help you put out a magnesium fire. Well, I'll tell you one thing. You should not use water. And we're gonna look at why, from a from a chemical point. And you should not use CO two, which is I gotta admit, it's a kind of fire extinguisher I have in my room in school. And those do not work for putting out magnesium fires. We're going to look at each one of the reactions. First, we'll look at magnesium plus water, and we'll see what we get here. And this will give us magnesium hydroxide and h two does NBC a problem here? Um, let me see. I gotta get balanced by putting into right there. Okay? Now, we're going to use Hess's law here and figure out our heat of reaction. So that's going to be products products first and reacted second. So we're gonna look up each and every one of these. So for these reactions, my NGO h is negative. 9 24 0.66 Killer jewels per mole. My hydrogen is zero, mike, magnesium is zero and my water is negative. Two 85.8. Killer jewels. Perm. Also this one super easy. So my delta age for this reaction will be my products only have one product, and there's gotta coefficient to one. So it'll be negative. 9 to 4 0.66 Kill a jeweled per mol minus to times negative to 85 0.8. So on this one, I get a delta H of negative 3 50 3.1 killed Jules per mole. That's a pretty big number. So, you know, this will release a large amount of heat and look what one of the products is. So water. Bad idea for a magnesium fire. Now, let's do magnesium plus carbon dioxide. And the products here will be magnesium oxide and carbon. Okay, So again, we're going to assign these and my m g o is negative. Six a 1.8 Lipsey. I've got my decimal in the wrong spot there. 1.8 killer jewels per mall. This is zero. This is zero, and my C 02 is negative. 3 93 0.5 Killer jewels per mole again. It's gonna be products minus reactant. So it will be too. Times negative. Six. So 1.8 minus minus 3 93.5 and I forgot my put my killer jeweled per mole right there. I'll just stick it right here. You know, my answer is going to be and killed Jules promote. Anyway. Okay, for this, let's do the math on this one, and we will get negative. 8108 10.1 killer jewels per mall. Okay, so this one is really, really a bad idea. Okay, Okay. Neither because this is terribly exo. Thermic. So it would release a lot of heat. And obviously, if you're putting out a fire, your goal is not to release heat. Okay, Done.
View More Answers From This Book
Find Another Textbook
Which of the following compounds is least reactive in an SN2 reaction?0 …
Use VSEPR theory to predict the molecular geometry around the bromine atom i…
Predict the major product for the following reaction:. When drawing hydrogen…
Draw the structure of alanine (Ala) at pH 2.5,at pH 6.1, and at pH 11.2.
Tensive and intensive propertiesJacinto Sweets sells jars extensive or i…
If 6 g of sodium azide are completely decomposed by the following reaction i…
Question 96 (1 point)In the acid-base reaction: HCN(aq) + F-(aq) = CN-(a…
Calculate the half-cell potential ofa Pt electrode in solution of 0.02M KMnO…
5.The reaction system POBr3lg) = POBr(g) + Brzlg) is at equilibrium. Which o…
Question 35 Status_ Not : yel answered Points possibleCalculate the gram…