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78 solutions

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

Bond Energy

Q. Suppose you did not have the molar enthalpy of formation for the following reaction: CH4(g) + H2O(g) → 3 H2(g) + CO(g). You could estimate ΔH° from the bond enthalpies. First, draw the dot structure for the reactants and products. Now calculate ΔH° from bond enthalpies of the reactant and products.

Solved • Dec 4, 2019

Bond Energy

Q. Use the molar bond enthalpy data in the table to estimate the value of ΔH°rxn for the equation: CH4(g) + 4 Cl2(g) → CCl4(g) + 4 HCl(g).

Solved • Dec 3, 2019

Bond Energy

Q. What is the approximate enthalpy of reaction (in kJ mol^-1) for the following combustion reaction CH4(g) + O2 (g) --> CO2(g) + H2O (g) using the given bond enthalpies (given bond enthalpies (given in kJ mol^-1)? (O-H)459 (C-H) 411 (O-O) 142 (O=O 494. (C-O) 358 (C=O) 799 a) -688 b) -378 c) -1095 d) -1692

Solved • Dec 2, 2019

Bond Energy

Q. Calculate the enthalpy of combustion using the bond energies

Solved • Dec 1, 2019

Bond Energy

Q. Calculate the enthalpy of the following reaction based on average bond enthalpies from the textbook: N-H = 391 kJ/mol, H-H= 432 kJ/mol, N (triple bond) N = 945 kJ/mol.

Solved • Nov 29, 2019