Questions: States of Matter Identifying the important intermolecular forces in pure compounds Decide which intermolecular forces act between the molecules of each compound in the table below. compound Intermolecular forces (check all that apply) --------------------------------------------------------- dispersion dipole hydrogen-bonding hydrogen sulfide ammonia carbon monoxide silicon tetrafluoride

States of Matter

Identifying the important intermolecular forces in pure compounds

Decide which intermolecular forces act between the molecules of each compound in the table below.

compound  Intermolecular forces (check all that apply)
---------------------------------------------------------
           dispersion  dipole  hydrogen-bonding
hydrogen sulfide         
ammonia         
carbon monoxide         
silicon tetrafluoride
Transcript text: States of Matter Identifying the important intermolecular forces in pure compounds Decide which intermolecular forces act between the molecules of each compound in the table below. compound | Intermolecular forces (check all that apply) ---------|------------------------------------------------ | dispersion | dipole | hydrogen-bonding hydrogen sulfide | | | ammonia | | | carbon monoxide | | | silicon tetrafluoride | | |
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Solution

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Solution Steps

Step 1: Identify the types of intermolecular forces

Intermolecular forces include:

  • Dispersion forces (London forces): Present in all molecules due to temporary dipoles.
  • Dipole-dipole interactions: Present in polar molecules due to permanent dipoles.
  • Hydrogen bonding: A special type of dipole-dipole interaction, present when hydrogen is bonded to highly electronegative atoms like nitrogen, oxygen, or fluorine.
Step 2: Analyze each compound
  1. Hydrogen sulfide (H\(_2\)S):

    • Dispersion forces: Yes, present in all molecules.
    • Dipole-dipole interactions: Yes, H\(_2\)S is a polar molecule.
    • Hydrogen bonding: No, sulfur is not electronegative enough to form hydrogen bonds.
  2. Ammonia (NH\(_3\)):

    • Dispersion forces: Yes, present in all molecules.
    • Dipole-dipole interactions: Yes, NH\(_3\) is a polar molecule.
    • Hydrogen bonding: Yes, hydrogen is bonded to nitrogen, which is highly electronegative.
  3. Carbon monoxide (CO):

    • Dispersion forces: Yes, present in all molecules.
    • Dipole-dipole interactions: Yes, CO is a polar molecule.
    • Hydrogen bonding: No, there is no hydrogen atom bonded to an electronegative atom.
  4. Silicon tetrafluoride (SiF\(_4\)):

    • Dispersion forces: Yes, present in all molecules.
    • Dipole-dipole interactions: No, SiF\(_4\) is a nonpolar molecule.
    • Hydrogen bonding: No, there is no hydrogen atom.

Final Answer

\[ \begin{array}{|c|c|c|c|} \hline \text{compound} & \text{dispersion} & \text{dipole} & \text{hydrogen-bonding} \\ \hline \text{hydrogen sulfide} & \text{Yes} & \text{Yes} & \text{No} \\ \hline \text{ammonia} & \text{Yes} & \text{Yes} & \text{Yes} \\ \hline \text{carbon monoxide} & \text{Yes} & \text{Yes} & \text{No} \\ \hline \text{silicon tetrafluoride} & \text{Yes} & \text{No} & \text{No} \\ \hline \end{array} \]

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