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84 solutions

Bond Energy

Q. Order the following from shortest to longest bond: C2, B2, H2, N2 A. H2, N2, C2, B2 B. N2, C2, B2, H2 C. C2, N2, H2, B2 D. C2, B2, H2, N2 E. none of these

Solved • Feb 17, 2020

Bond Energy

Q. Estimate the standard energy change ΔE for the reaction below: C2H4(g) + H(g) => C2H6(g) Data: Bond energies in kJ/mol: H-H, 432; C-H, 415; C-C, 345; C=C, 615 a) -280 kJ b) -180 kJ c) -128 kJ d) +974 kJ e) -228 kJ

Solved • Feb 10, 2020

Bond Energy

Q. Which of the following has the bonds listed in the order of increasing bond energy? a) N≡N, N=N, N-N b) N≡N, N-N, N=N c) N-N, N=N, N≡N d) N=N, N-N, N≡N e) N=N, N≡N, N-N

Solved • Feb 10, 2020

Bond Energy

Q. Estimate ΔE (Kj) for the reaction: C2H5Cl(g) => HCl(g) + C2H4(g), given the following bond energies in kJ/mol: C-C, 348; C-H, 414; Cl-Cl, 242; C-Cl, 327; H-Cl, 431; C=C, 615 A. +43 kJ B. -305 kJ C. +109 kJ D. -43 kJ E. +305 kJ

Solved • Feb 11, 2020

Bond Energy

Q. Using trends in bond energy discussed in class, select that strongest bond among the following choices. A. C-S B. C-O C. C-C D. C-N E. C-F

Solved • Feb 11, 2020

Bond Energy

Q. Using the bond dissociation energies below estimate the enthalpy of the reaction of ethylene gas with oxygen gas to make carbon monoxide and water.

Solved • Dec 27, 2019

Bond Energy

Q. Given the average bond energies below: Bond (average bond energy in kJ/mol): C≡C (839), C-C (348), H-I (299), C-I (240), C-H (413), What is the energy associated with breaking all of the bonds in the acetylene molecule? what is the energy associated with breaking all of the bonds in the hydrogen iodide molecules? Confused:**I know that breaking bonds has a positive sign, but the hydrogen iodine is on the products side which is usually negative.

Solved • Sep 16, 2019