Chemistry Homework Help

Browse Homework Solutions

113 solutions

Bond Energy

Q. If hydrogen were used as a fuel, it could be burned according to the following reaction:2 H2 + O2 2 H2OCalculate Hrxn. for this reaction using average bond energies.H-H = 436 kJ/mol;O=O = 498 kJ/mol;H-O = 464 kJ/mol

Solved • May 4, 2020

Bond Energy

Q. Light with a frequency (ν) = 2.37 x 1015 s -1 has sufficient energy to break the bond in N2. Calculate ∆H (in kJ/mol) for the reaction: N2(g)  2 N(g) ∆H = ? The molar mass of N2 = 28.02 g/mol

Solved • Apr 28, 2020

Bond Energy

Q. The enthalpy change for the following reaction is -748 kJ/mol. Using bond energies, estimate the C≡O bond energy in CO(g). 2CO(g) + 2NO(g) → 2CO2(g) + N2(g)

Solved • Apr 7, 2020

Bond Energy

Q. Use average bond enthalpies (linked above) to calculate the enthalpy change for the following gas-phase reaction. CH4(g) + 2F2(g) → CH2F2(g) + 2HF(g) To analyze the reaction, first draw (on paper) Lewis structures for all reactant and product molecules.

Solved • Apr 7, 2020

Bond Energy

Q. A2 + B2 → 2 AB ΔHrxn = 0 kJ/mol (Select all that apply.) a) A-A b) A-B c) B-B d) A-B

Solved • Apr 7, 2020

Bond Energy

Q. The length of a covalent bond depends upon the size of the atoms and the bond type. For each pair of covalent bonds, choose the one expected to have the shorter bond length. Enter the letter (A or B) in the answer field. (A) H-Br (B) H-Cl Enter the letter (A or B) in the answer field. (C) Si-Cl (D) S-Cl

Solved • Apr 7, 2020

Bond Energy

Q. Compare the N-O bond distances in each of the two molecules. In which molecule is the N-O bond longer?

Solved • Apr 7, 2020