Given the table of bond energies, which of the following is an accurate comparison of the energetics of breaking bonds? H-H 436 H-F 569 H-Cl 432 H-Br 366 H-I 298 C-H 410 C-c 350 CIN 300 C1O 350 C-F 450 C-Cl 330 C-Br 270 CII 240 Table of Average Bond Energies (kJ/mole) N-H 390 NIN 240 N-F 270 N_CI 200 N-Br 240 N1O 200 01H 460 010 142 01F 180 O Cl 200 011 220 ▾ F-F 157 F-Cl 251 F-Br 234 CI-CI 243 Cl-Br 219 Br-Br 1-1 1-Br I-CI 1-F 194 153 179 208 280 C=C C=0 C=N C=S 611 745 615 477 010 498 N=N 418 N=O 607 C C C=O C=N NEN 835 1077 891 941 It is harder to break a C-C single bond than a C=C double bond because breaking the single bond releases more energy. It is harder to break a C-C double bond than a C-C single bond because breaking the double bond requires more energy OIt is harder to break a C-C single bond than a C=C double bond because breaking the single bond requires more energy. It is harder to break a C=C double bond than a C-C single bond because breaking the double bond releases more energy.
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
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