Exam 9: Models of Chemical Bonding

Hydrogenation of double and triple bonds is an important industrial process. Calculate (in kJ) the standard enthalpy change ?H $\degree$ for the hydrogenation of ethyne (acetylene) to ethane.

Which of the following is a covalent compound?

Select the correct formula for a compound formed from calcium and chlorine.

For which of the following elements (in their normal, stable, forms) would it be correct to describe the bonding as involving "electron pooling"?

Most of the copper sold in major metal markets is highly purified, typically to 99.99%. Why is this?

Ionic bonding typically occurs when a ______________ bonds with a ______________.

Acetone can be easily converted to isopropyl alcohol by addition of hydrogen to the carbon-oxygen double bond. Calculate the enthalpy of reaction using the bond energies given.

Which one of the following properties is least characteristic of typical ionic compounds?

The stronger the bonds in a fuel, the more energy it will yield.

The lattice energy of large ions is greater in magnitude than that of small ions of the same charge.

In not more than three sentences, describe the electron arrangement responsible for bonding in Cl₂ molecules.

Using appropriate, real examples to illustrate your answer, describe the correlation between bond energy and bond length for a series of single bonds.

Arrange oxygen, sulfur, calcium, rubidium and potassium in order of decreasing electronegativity.