The boiling point of a substance is determined by the strength of the forces between its molecules. The stronger the forces, the more energy is required to break them and therefore the higher the boiling point.

1. PH3: This molecule has dipole-dipole interactions and London dispersion forces.

2. CO: This molecule has dipole-dipole interactions and London dispersion forces.

3. H2: This molecule only has London dispersion forces, which are the weakest intermolecular forces.

4. NH3: This molecule has hydrogen bonding (which is a type of dipole-dipole interaction but much stronger), dipole-dipole interactions, and London dispersion forces.

Hydrogen bonding is the strongest intermolecular force among these, so NH3 will have the highest boiling point.

Question

The boiling point of a substance is determined by the strength of the forces between its molecules. The stronger the forces, the more energy is required to break them and therefore the higher the boiling point.

1. PH3: This molecule has dipole-dipole interactions and London dispersion forces.

2. CO: This molecule has dipole-dipole interactions and London dispersion forces.

3. H2: This molecule only has London dispersion forces, which are the weakest intermolecular forces.

4. NH3: This molecule has hydrogen bonding (which is a type of dipole-dipole interaction but much stronger), dipole-dipole interactions, and London dispersion forces.

Hydrogen bonding is the strongest intermolecular force among these, so NH3 will have the highest boiling point.

Knowee AI · Accepted Answer

The boiling point of a substance is determined by the strength of the forces between its molecules. The stronger the forces, the more energy is required to break them and therefore the higher the boiling point.

1. PH3: This molecule has dipole-dipole interactions and London dispersion forces.

2. CO: This molecule has dipole-dipole interactions and London dispersion forces.

3. H2: This molecule only has London dispersion forces, which are the weakest intermolecular forces.

4. NH3: This molecule has hydrogen bonding (which is a type of dipole-dipole interaction but much stronger), dipole-dipole interactions, and London dispersion forces.

Hydrogen bonding is the strongest intermolecular force among these, so NH3 will have the highest boiling point.

Which of the following substances will have the highest boiling points? PH3COH2NH3

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