In each of the following groups of substances, a) identify the type of IMF and b

Question

In each of the following groups of substances, a) identify the type of IMF and b) circle the one of the set that has the given property. a) highest boiling point: HCl _____, Ar _______, F_2 ______ b) lowest freezing point: H_2O _______, NaCl _____, Ne ______ c) highest vapor pressure: Cl_2 _______, Br_2 ______, I_2 ______ d) lowest freezing point: N_2 ______, CO ____, CO_2 _______ e) lowest melting point: CH_4 ______, CH_3CH_3 _____, CH_3CH_2CH_3 _____ f) highest boiling point: HBr ______, HCl _______, HF _______

Explanation / Answer

(a) HCl : dipole-dipole interaction

    Ar : VW force

    F2 : VW force

Highest boiling point : HCl

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(b)

H2O : H-bonding

NaCl : ionic bonding

Ne : VW force

Lowest freezing point : Ne (weakest intermolecular force = lowest freezing point)

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VW force in all three

Highest vapor pressure : I2

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N2 : VW force

CO : dipole-dipole interaction

CO2 : VW force

Lowest freezing point : CO2

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all have VW force

lowest melting pont : CH4

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all have dipole -dipole interaction

HF,HCl : H-bonding

Highest Boiling point : HF strongest H bonding

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