I was under the under the impression that lower intermolecular forces equated to

Question

I was under the under the impression that lower intermolecular forces equated to higher volitility. However, im not sure if im just detrmining which compounds have what strength of intermolecular forces incorrectly, or if there is somethng else to consider when ranking these items. Additionally, im confused about part
B as well

any help would be appreciated, thank you

Place the following substances in order of decreasing volatility Rank the substances from most volatile to least volatile. To rank items as equivalent, overlap them. Most volatile Least volatile The correct ranking cannot be determined. reset help Submit My Answers Give Up Incorrect, Try Again; 4 attempts remaining

Explanation / Answer

what ever point you said is correct along with that you need to consider molecular weight of the substences as well

for exaple you kow that lower alkanes are gases like methane butane where next level alkanes are liquids like pentane to decane if you go even higher alkanes thise are densy liquids in similar way

Cl2 is has, Br2 is liquid I2 is solide means while increasing molecular weight also compound nature is changing

you know that liquids having lesser volitile than gases and solides having lesser volatile than liquids

now comming to the your examples here along with inter molecular forcess you need to consider molecular weight of the substence also

first example

CH4 > CH3Cl > CH2Cl2 > CH2Br2 > CHBr3 >CBr4

least volatile compounds will have highest boiling point.

CBr4 > CHBr3 > CH2Br2 > CH2Cl2 > CH3Cl > CH4

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