3.1 Identify the type of intermolecular forces acting in:
3.1.1 Propane
3.1.2 Propanal
3.2 How does the strength of the intermolecular force influence the boiling point of organic molecules?
3.3.1 Which one, ethanol or pentanal, will have the highest vapour pressure?
3.3.2 Explain the answer to QUESTION 3.3.1 - NSC Technical Sciences - Question 3 - 2021 - Paper 2
Question 3
3.1 Identify the type of intermolecular forces acting in:
3.1.1 Propane
3.1.2 Propanal
3.2 How does the strength of the intermolecular force influence the boiling p... show full transcript
Worked Solution & Example Answer:3.1 Identify the type of intermolecular forces acting in:
3.1.1 Propane
3.1.2 Propanal
3.2 How does the strength of the intermolecular force influence the boiling point of organic molecules?
3.3.1 Which one, ethanol or pentanal, will have the highest vapour pressure?
3.3.2 Explain the answer to QUESTION 3.3.1 - NSC Technical Sciences - Question 3 - 2021 - Paper 2
Step 1
3.1.1 Propane
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Answer
The intermolecular forces acting in propane are London dispersion forces, also known as induced dipole forces.
Step 2
3.1.2 Propanal
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Answer
In propanal, the intermolecular forces include London dispersion forces as well as dipole-dipole forces due to its polar carbonyl group.
Step 3
3.2 How does the strength of the intermolecular force influence the boiling point of organic molecules?
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Answer
The strength of the intermolecular forces directly affects the boiling point of organic molecules. Generally, stronger intermolecular forces result in a higher boiling point, as more energy is required to overcome the attractive forces between the molecules when transitioning from the liquid to the gas phase.
Step 4
3.3.1 Which one, ethanol or pentanal, will have the highest vapour pressure?
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Answer
Ethanol will have the highest vapour pressure.
Step 5
3.3.2 Explain the answer to QUESTION 3.3.1.
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Answer
Ethanol has stronger intermolecular forces due to the presence of hydrogen bonding, while pentanal, being a larger molecule with predominantly London dispersion forces, experiences weaker intermolecular attractions. Thus, ethanol, which has stronger forces, will exhibit lower vapour pressure compared to pentanal.
Step 6
3.4.1 Define the term monomer.
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Answer
A monomer is a small organic molecule that can be covalently bonded to other such molecules to form a polymer.
Step 7
3.4.2 Write down the NAME of the polymer formed from the monomer given above.
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Answer
The name of the polymer formed from the given monomer is Polyethylene.
