Consider the following reaction +HB Use the data in table below for your answer
ID: 713811 • Letter: C
Question
Consider the following reaction +HB Use the data in table below for your answer TABLE 6.1 BOND DISSOCIATION ENERGIES (A 0F COMMON BONDS KJ/MOL KCAL/MOL KJ/MoL KCAL/MOL (CHa) CH-F (CH),CH-CI 335 (CHJ:CH-8r 2856 (CH CH 222 53 HC-CH-CH3385 92 489117 Bonds to H 444 106 435 435 410 104 104 98 H-CHa Bonds to methyl 435 104 (CH32CH-OH 381 91 456109 351 293 234 381 91 CH -F 473 113 CH3 70 56 Hac-6-x CHr-Br 356 85 381 444106 331 272 65 (CHalC H 91 464 111 36487 (CH)3C-I (CH33C-OH 381 410 569 136 CH CH2H 431 103 : CH3CH2-f 368 88 CHCHz-C33981 X-X bonds 297 71 CH3CH2-Br 285 68 498 119 CH3CH2-I 448 107 F-F c-a Br-Br 15938 242 192 151 2135 . . 222 53 H-OCH CH 435 104 CH3 HO-OH C-C bonds H3C-C-X CH/CH CH 351 8 (CHaCHH3795 (a) Estimate AH for this reaction.Explanation / Answer
I tried to analyze both the questions, and I am thinking that both are one and the same question. So, I will give it a shot.
As is relevant from thermodynamical principles, the bond dissociation energy of a chemical reaction can be estimated from the bond dissociation energies of individual molecules.
For the first part of the question, we use the table to calculate H:-.
Summing these up: -28kJ/mol
Now, moving on to the next part of the question:
(b)Since the reaction moves with an increase in the number of moles, the entropy change of the reaction is positive.
S if the reaction is positive because 1 mole of the reactant is converted to 2 moles of product.
(c)As H and negative of the term(TS) are negative, they contribute to a negative value:of G
(d) Since both terms are negative, sign of G in independent of temperature
(e) Since there is a (-TS) term in the expression for G, magnitude of G is always dependent on temperature.