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Question 33Determine the AH for the following reaction:4Hzo 2C0z302 + 2 H-C-OHbondenergy (kJlmol)CH4130-04950-H463C-O799c-0358310k1295ku-1295k-310k...

Question

Question 33Determine the AH for the following reaction:4Hzo 2C0z302 + 2 H-C-OHbondenergy (kJlmol)CH4130-04950-H463C-O799c-0358310k1295ku-1295k-310k

Question 33 Determine the AH for the following reaction: 4Hzo 2C0z 302 + 2 H-C-OH bond energy (kJlmol) CH 413 0-0 495 0-H 463 C-O 799 c-0 358 310k 1295ku -1295k -310k



Answers

Identify the product in the given reaction. $\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}_{2}+\mathrm{NOCl} \rightarrow(\mathrm{A})$ (a) $\mathrm{CH}_{3}-\mathrm{CHCl}-\mathrm{CH}_{2} \mathrm{NO}$ (b) (c) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHClNO}$ (d) $\mathrm{CH}_{3} \mathrm{NOCH}_{2} \mathrm{CH}_{2} \mathrm{Cl}$

So here we have a Siri's off bond energies At 298 Calvin listed up on the left of the screen, we have 02 which is 498 and two, which is 946 after which is 159 c l two, which is 243 c out F, which is 2510 f, which is 213 c l O, which is 205 and an F, which is to 80 killer jewels. Permal. Now these units do apply to all of these values are listed up here, so here won't just identifying the bonds broken and finding our total energy to break our bonds. Then we're also looking at our bonds are formed And then again, we're just finding that total energy released to form a new bond. And after that, all we do is out of the energies of our bonds broken and bonds formed, using the values that are listed to our left. I've just highlighted with the red marker and then we can do that in order to generate our figures for mental peace off formations. So we are four examples him where we've used this method that highlights it down below in order to generate the entropy of formation figures. So here we have C l f, which isn't minus 50 0 f two, which is minus 18 c l 20 which is 82 NF three, which is minus 1 to 5.5 Killer jewels promo and again does units applied to all off the figures that are listed.

The question we are given that delta ads of N 20. Of N two is equal to 80 to kill a jewel Permal Permal. Now we are given the bond energies, bond energy be bond energy of of N. And N bond which is uh 9 46. Kill a jewel Permal per mole. And N and N R R. A. Test by double bond and N double bond N. Uh the bond energy is given us 418 kg joules per mole. And for all and all the bond energy is given as 4 98 kg joules per mole. And for N. And O. Double bond. Oh uh the bond energy is given a 607 kg jewel Permal Permal. Now the question would be and triple bond N. Which is N two plus harb or double bond or that means or two that gives us and double bond and double bond. Oh, so from here I can find that delta edge of the reaction will be the submission of the bond energy bond energy of reluctance of reactant minus sigma, bond energy, bond energy of products, bond energy of products. So from here I can write the bond energy of and and and triple bond is a 9 46 plus poor. Oh and oh it is 4 98 4 98. And we are here we have half or two. So we will multiply it by half. So this will be the bond energy of reluctance minus bond energy of the products will be +418 plus +607. It comes out to be 1 70 kg jewel, 1 70 kg jewel. Now the resonance energy resonance resonance energy that will be equal to delta edge, which is absurd, absurd minus delta edge, which is calculated calculated here we have calculated 1 70 kg jewel and delta, which is given in the question is 80 to minus 1 70. That means minus 88 kg jewel. So in the given options option, they will be the right answer.

To estimate the anthology of the reaction with bond energies. We need to look up the bond energies. I'm using the bond energies found on page 345 of the textbook. When using bond energies we need to know what bonds are found in each of the molecules. This molecule contains four C. H. Bonds to on this side and two on this side A. C. H bond is 4 16. According to table 82 on page 3 45. Well then add to that the bond strength of the C. Double bond C. 5 98. And then the bond strength of A. Br br. 1 43. Well then subtract off the bond energies associated with the product. There are going to be four C. H bonds. Again we've got these hydrogen bonded to the carbon and this bro mean bonded to the carbon. So we've got to C. H bonds here and to C. H bonds here giving us a total of four. Then we've got a C. C. Bond and we've got to CBR bonds. CBR bond. And therapy is to 85 killer jewels. So again we'll take the some of the bonds of the reactant minus the sum of the bonds of the products. And we get negative 135 killer jewels. I know in the back of the book it's -121 and I'm not quite sure how they got that answer. I've triple checked this for the next one. We have H. 202 going to H. 20. And one half to so H. 202 contains two Oh. H. bonds at 467 bond in therapy. And then there is one 00 bond single bond. It's like this So there's one oo single bond At 1 46. And then we'll subtract off. There's Htoo, there's two H. O. Bonds At 1467 each and then we've got one half a. Oh double bond. Oh which according to the table for 02 is 4 98. And this then gives us the answer that is in the back of the book -1 of three killer jewels.

Yeah we have a trojan carbon Georgia. Yeah. Grass entire protein province for me. Hydrological we have the specific bond energies and we know that the in therapy will be born energy of reactant minus the pond energy of products. So we have four C. H. Bonds. Sorry we have four C. H. Bonds and product. So until a P. Change will be full multiplied with 413 ch bones have an in talebi of 413 and we have four bones in product so plus one carbon to carbon bond One carbon to carbon. So sorry we are looking at reactions first of all so die carbon having talebi of 602 62 glass Romain dopamine bone has 193 One multiplied fit 1 93. So this is a totality of reactant and for the products it will be Carbon to carbon. Single bond have mentality of 346 one month implied with 346 Plus 44 ch bones 413 plus too far Blooming and car brand which is 25 2 85. Yeah. Now the old rolling Talebi change is -1 21. Okay that's cool promote reaction for the second. Okay. Mhm exclusion in Jordan whole edge plus half oxygen in therapy. Sorry bond energy of reactant minus the bond energy of products. So well single born dock station have 1 46 146 plus oxygen and hydrogen which is 463 with two. Mhm. Mhm. to multiply with 400 and 63 oxygen and hydrogen. Let's have for di oxygen, which is 4 98. Yeah. Sorry. Yeah. And the total And Taliban changes -1 or three. Okay. Which moved far more. Okay. Mhm.


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