Questions and Answers
What is the strongest type of intermolecular force present in ammonia (NH3)?
What are the intermolecular forces present in ethylene glycol (C2H6O2)?
Identify the compound that does not have hydrogen bonding.
Place the following substances in order of decreasing boiling point: H2O, H2S, H2.
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Identify the substance with the highest boiling point.
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Study Notes
Intermolecular Forces in Ammonia
- Ammonia (NH3) exhibits hydrogen bonding as its strongest intermolecular force.
- Being a polar molecule, it also contains dipole-dipole interactions and dispersion forces.
Intermolecular Forces in Ethylene Glycol
- Ethylene glycol (C2H6O2) has dispersion, dipole-dipole, and hydrogen bonding as its intermolecular forces.
- Dispersion forces are universal across all molecules; dipole-dipole forces occur in polar compounds; and hydrogen bonds are present due to the hydrogen attached to electronegative atoms.
Hydrogen Bonding Presence
- The compound CH4 (methane) does not exhibit hydrogen bonding.
- Hydrogen bonding requires hydrogen to bond with highly electronegative elements like F, O, or N, which CH4 lacks.
Boiling Point Comparison
- The order of boiling points for substances: H2O > H2S > H2.
- Water (H2O) has the highest boiling point due to hydrogen bonding, while H2S has polar characteristics but lacks hydrogen bonding, and H2 is non-polar with the lowest boiling point.
Highest Boiling Point Substance
- HF (hydrogen fluoride) has the highest boiling point among the options due to its ability to form hydrogen bonds.
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Description
This quiz covers key concepts from Chemistry Unit 2, focusing on intermolecular forces and molecular structures. Review the properties of ammonia and ethylene glycol in preparation for your exams. Test your understanding and enhance your knowledge on these essential topics.
