) Does antifreeze ingredient ethylene glycol (HOCH2CH2OH; MM = 62.07 g/mol) have a lower or higher or same surface tension than propanol (CH3CH2CH2OH; MM = 60.09 g/mol) a compound with a similar molar mass?
I) Does antifreeze ingredient ethylene glycol (HOCH2CH2OH; MM = 62.07 g/mol) have a lower or higher or same surface tension than propanol (CH3CH2CH2OH; MM = 60.09 g/mol) a compound with a similar molar mass?
II) Which intermolecular forces is/are present in pure ethylene glycol, HOCH2CH2OH? (Choose the correct letter from choices a – e)
i. dispersion ii. dipole-dipole iii. hydrogen bonding iv. ion-dipole
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a. i & iii only
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b. ii & iv only
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c. i & ii only
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d. i, ii & iii only
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e. all four
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III) Which intermolecular forces is/are present in pure propanol, CH3CH2CH2OH? (Choose the correct letter from choices a – e)
i. dispersion ii. dipole-dipole iii. hydrogen bonding iv. ion-dipole
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a. all four
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b. i, ii & iii only
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c. i & iii only
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d. ii & iii only
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e. iii & iv only
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IV) The reason for the correct answer to (I) above is because (choose from choices A - E)
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A. there are more H-bonds in HOCH 2 CH 2 OH than in CH 3 CH 2 CH 2 OH.
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B. there are less H-bonds in HOCH 2 CH 2 OH than in CH 3 CH 2 CH 2 OH.
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C. HOCH 2 CH 2 OH and CH 3 CH 2 CH 2 OH contain the same types of IM forces.
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D. HOCH 2 CH 2 OH is polar while CH 3 CH 2 CH 2 OH is not.
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E. HOCH 2 CH 2 OH is slightly heavier than CH 3 CH 2 CH 2 OH.
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