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Queation Completion StatusHoving t0 another question Wi' | save thes roSponSeQuestion 13Uslng the following data" Hztg) Br2(9) 2HBrig) Hilg) 2Ha) 0t2t 2Bi...

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Queation Completion StatusHoving t0 another question Wi' | save thes roSponSeQuestion 13Uslng the following data" Hztg) Br2(9) 2HBrig) Hilg) 2Ha) 0t2t 2Bitg) cilculzee the enetoy ofan H-Br bond, 261 0-364 kJ 728 kJ 522k DERAH (kJiMoving anothor Gyvun ~save th5 [ospons

Queation Completion Status Hoving t0 another question Wi' | save thes roSponSe Question 13 Uslng the following data" Hztg) Br2(9) 2HBrig) Hilg) 2Ha) 0t2t 2Bitg) cilculzee the enetoy ofan H-Br bond, 261 0-364 kJ 728 kJ 522k DER AH (kJi Moving anothor Gyvun ~save th5 [ospons



Answers

Use the data of Table 13.1 to calculate the enthalpy of solution of LiCl. $$\Delta_{j} H^{\circ}(s)=-382.9 \mathrm{kJ} / \mathrm{mol}$$ and $$\Delta_{j} H^{\circ}(\mathrm{aq}, 1 m)=-369.5 \mathrm{kJ} / \mathrm{mol}$$

An a C L O for has a solid changes state to any Cielo for a quiz and we can use their adult age is to figure out the Delta h of Solution an A C l O for a Quist's has value of 3 69.5 Callejon's per mole minus negative, 382.9 We're solid. That gives us a value of 13.4. Kill a Jules Permal.

So here we are given a specific chemical reaction. So we have foo mean, which is just and H. H. Connected to a carbon carbon, hydrogen, hydrogen and three carbon hydrogen bonds here. And we have a dissociation reaction platforms, ethylene or ethylene. So this is this compound plus ammonia. So we have to make sure that we have the same number and so on both sides. And if we see that's and we see that satisfied. So that means that this we wrote the chemical reaction in the correct way and were given that the entropy of this reaction is defined as 53.6 killer jewels per mole of reaction. Mhm. So an important point to notice is essentially her fundamental piece. We have to assume that everything is in the gashes form since that's what bond and puppies are defined according to. And were given a long list of data valleys for bond mantelpiece. It's important to remember that the delta H of the reaction is approximated by essentially breaking the bonds. Yeah minus essentially the released energy from forming bonds. Uh huh. So this is a way to approximate the empathy of a reaction, mainly by characterizing the different bonds in chemical reactions. Yeah, so here we see that we have 12 345 So we're breaking five C. H bonds. Okay. In the bonds broken part were also breaking carbon carbon bond, We're also breaking a carbon nitrogen bond and we're breaking too nitrogen hydrogen bonds. So this is for the bonds broken part. And in the bonds formed, we see we're forming a carbon carbon bond, we're forming four carbon hydrogen bonds and we're forming three nitrogen hydrogen bonds. So we have data values for all the average bond temple piece for this. So for CH. It's 413 killer jewels promote. First he C 346 kg Permal for C double bond at the C 602 kg per mole. Mhm. For NH this is 391 killer pills promote and manly. All we're doing here is substituting into our equation and finding uh the bond entropy for the C. N. Bond. So it's important to remember that the entropy is fifth. The entropy of reaction is 53.6. So we can see that this is minus four here. So this can cancel out and this just becomes one C. H bond. Yeah, let's see if we can cancel out anything else. So this becomes to NH minus three. NH as a result of the and H. Sign. So it's in total it becomes CH minus one NH and it looks like we can't cancel anything else out. Plus the contribution of C. C minus the contribution of C double bond at the sea plus the contribution of C bonded to end nitrogen. And were given that the entropy of this reaction is 53.6. So we have to add the CC double bond, add the nitrogen hydrogen bonds, and then subtracts the carbon hydrogen bonds and subtract the carbon carbon bond. And we find that first CNN this is equivalent to about 288 killer jewels per mole of bonds. And that's your final answer.

So in this problem Number 62. Using the following data for the mag nation Fluoride toe Estimate the value off del E for the following reaction. So the reaction given his magnesium plus Floren that will form mag nation fluoride solid. So we find out the value off Del E for this reaction. So we have given some information. Some daughter that is the latest energy which is equal to minus 2913 Kill Ojul Permal. Then we given as the first ionization energy. So first ionization energy off magnesium, which is the call to 7. 35 colonial Permal. So second ionization energy off mag nation is 1445 Kill a jewel Permal, then electron off 20 off flooring atom which is a cult toe minus 3 28 Colonial Permal, then bond energy. So bond energy off F toe value is 1 54 kg joule per mole And finally, energy off sublimation energy off sublimation for magnesium which is a call to 1 50 local Permal. So firstly, we can see that see how, uh, thes reaction can take place. So that is the magnesium solid can avert in tow. McGuinn ish um, guests. So this process is known as the sublimation so that we can write delta at sublimation. And this value is 1 50 colonial Permal. So sublimation is a converge inal. Solid toe. Guess form now. Magnesium guess. Convert in tow. Magnesium plus catan. So basically, this process is known as the ionization energy, so I can write Delta H I, even for magnesium is 7 35 colonial Pirmin. So ionization energy is the amount of energy required to remove an electron from an isolated, gassy system. So in this direction, basically lost off electron can take place now. Second ionization energy is mg pless. It can avert into mg toe plus plus electron. So basically, here again, lots of fun Electron can take place so that I can write del edge. I e. Tow for this reaction is +1445 So del h i e do is the second ionization energy off magnesium. So this is the first ionization energy and now second ionization energy. Now we see that this flooring guess is converted into two f guess and the bond energy off Lauren Bond energy off flooring that is equal to 1 54 colonial per mole. And then we can see that this floor een is converted into two F minus. That means an iron. So this is known as the electron off 20. So tell EJ electron off nt off lowering anatomies minus 3 28. So electron affinity is the amount of energy released when an electron is added when isolated, gassy system. So we see that in case off flooring, we can add one electron to form F minus. But here we are using to flooring atom to form two f minus so that we can see that in this case, Del Edge. Uh, Elledge election of 20 is multiplied by two. So 3 28 into two. So which is he called to minus 6 56? Colonial Permal. So now we can see that the magnesium toe plus that in the gas form and this two F minus in the gas form that form M g f toe solid. So Dell edge that we let this energy for this. A reaction is minus 2913 So this value is minus 2913 291 See now minus 2913 Colonial promote Now we can add up all the reaction So Dell edge information or del e? So they're tell EJ sublimation. Tell ej ionization I even first ionization energy del edge I Ito means second ionization energy Then Del Edge Village is the born energy off Lorene So I can write bond energy off flooring after Then we see that tell EJ Electron often tee off Lorene then they'll edge. Let this energy so on putting the value we get here 1 50 then tell h I even is 7. 35 del edge E to that in second ionization energy 1445 Then they'll edge born dissociation energy off Lorene So which is equal to 1 54 then Del Edge Election of 20 off Lauren is minus 6. 56 because we are using to malls. So now Dell edge lettuce energy is minus 2913 So on solving we get This is minus 1085 city kilo Jewell Permal So that means in final answer, we can write Del Edge formation or del E for this reaction is minus 1085 Hello, Joel Pirmin. So this is our final answer so in that day econometric form we can also explain, uh, this process Basically this is the sum. This is some other method. So basically magnesium directs with Florin and it will form MGF too. So we can see that firstly, magnesium solid is converted into magnesium CASS form and then magnesium guess is converted into M G plus Guess that when first organization energy and then it is converted into mg toe plus guess that is the second organization energy. So that means I can return as, uh, this is del edge sublimation because all that convert toe guess so which its value is 1 50 then this is known as the ionization energy. So that means I can write del Edge. I even that is the first ionization energy. So which is 7 35 kg joules and then this is the second. This is the first organization energy and this is the second ionization energy. So tell EJ I eat toe which is they call dough one 445 Colonial Permal. And now we can see that this florin he's converted in toto f guests. So that means dissociation energy or born dissociation energy. So bond energy off Laureen is around 1 54 eso this This value is given in the, uh these old values given in the caution so that this value is 1 54. So tell EJ Bond Energy So 1 54. Now we can see that this flooring is converted into, So this flooring is converted into two F minus guests and this is known as the electron off NT. So electron off 20 is minus 3 28 multiplied by two. Because here we convert into two floor into two f minus so which is equal to minus 6 56 Colonial Permal. And finally we see that this that is the magnesium two plus And this is magnesium two plus, I guess, and this two f minus guess so. This combined. So like in this way Ah, like lettuce energy. So this combined can add up this So this combined to form like it's combined to form. That is MGF too. So this will combine to form that is the MGF too, so that it's from MGF too. So this value is through the latest energy. So this is known as they let this let this energy so tell EJ Let this energy so which is equal to minus 2913 minus 2913 So this will combine to form M G F two so that we can understand like this is MGF too. Yeah, this is M G f toe solid like this. So similarly now we can add up this and we find out this latest energy. Now we can simply add a thes formations or village for village information or simply del e tell. So we get the Elledge sublimation Les Bell edge I even Let's del edge I Ito less del edge Bond energy plus de lege electron off nt. Let's bell edge Let this energy so on. Put putting the value 1 50 plus 7 35 +1445 plus 1 54 minus 6 56 minus 2913 And finally we get the ledge formation or Del E for this reaction is minus 1085 Illogical Baltimore. So both the answer are same. Some method is different. This is based on the sum has isla. So this diagram will explain more accurately and this will also explain. So these, uh we can find out the answer in both the ways and the answer is same. Yeah,

So in this video, we're gonna work your question. 150. Conductor eight which says Use the following data, so estimate Delta H off for burying bromine. So we have solid barium plus gaseous beer to forming baby are too solid. Um, and the data that were given is three lot of energy for burying bromide, the first ionization energy of barium and the second ionization energy of barium. The electron affinity for bro Ming and the bond energy of di atomic chromium on, then the entropy of sort of sublimation herbarium. So solid barium going to gaseous spare barium. Um, so we're gonna need all of these, but let's go over all of the steps in the formation of an Ionic solid. Um, So where do we start? Well, we need to get both of our ions. We know our ionic solid is made from a cat eye on and are to an ions. So we need to first form our be a plus two cat eye on and R B R minus and ions. So let's start with forming are very, um, cat eye on. So first we need to get very, um into the gas phase. So we use the MPA p of sublimation for barium. So that's our 178 college als Ramon. And then Lansbury, um, is in the gas phase. We use the first ionization energy of barium, so that's the energy it takes to remove an electron from barium. So then we form our plus one eye on, and that cost us 503 colleges Pro Bowl. So once we have our plus one eye on, we want to remove a second electron. So we take the second ionization energy of barium. So that gets us from be a plus to be a plus two. And that cost us another 965 village rolls per mole then. So we already have our cat eye on. We have our being plus you. And now we want our an ion eso To start with, we need to take our die atomic br two and associate it. We need to break that bond. So we use the bond energy of B R two, um, and that forms 193 killing joules per mole. And I'm not going to multiply this by 1/2 or anything for just one, bro. Mean I want to be our cause. Remember my formula. Barbarian bromide is b A b r to So at the end of this, I'm gonna need to roaming Adams. But anyway, once I've dissociated, might be our two and two to br. I can ionizing. It s So this is where the electron affinity of bro mean comes into play s o the energy that it takes for bro Ming to attract an electron. Um, so that that electron affinity is negative 325 villages per mole. And remember, I have to bro mean adams to bromide ions in my b a b r to. So I'm gonna multiply this by two because I need to form B R minus twice. Um, so I also multiply the electron affinity by two. Um, and now I have my be a plus two in my to be our minus, so I can go ahead and use my lattice energy. So the latticed energy is the energy it takes to form the ionic lattice. So it's the energy that's released when our, um when our cat eye on and are too and ions come together and that's negative. 1985 villages per bowl s. So let's add all of that together to get our, um, our intel appear formation for B A b r to S. So that's equal Thio are in therapy of sublimation, plus our first ionization energy of barium, plus our second ionization energy of Beria plus the association The Bond energy of the arch two plus twice the electron affinity of bro mean minus the lad will plus the latticed energy. But it's negative for B A B R to and that gives us negative 796 killed joules per mole. So overall, this is an extra thermic process.


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