Consider the intermolecular forces present in a pure sample of each of the following compounds: CH3CH2CH2NH2 and CH3CH2CO2H Identify the intermolecular forces that these compounds have in common.

What kind of attractive intermolecular force(s) are found in this compound? inte 13) H3N N

Compare the boiling points of the various isomeric hydrocarbons shown in the table below. Notice the relationship between boiling point and structure; branched-chain hydrocarbons have lower boiling points than the unbranched isomer. Speculate on possible reasons for this trend. Why might the intermolecular forces be slightly different in these compounds? Compound Boiling Point (°C) 68.9 Hexane 3-Methylpentane 2-Methylpentane 2,3- Dimethylbutane 2,2- Dimethylbutane 63.2 60.3 58.0 49.7 The more branched structure has smaller exposed surface and hence weaker dispersion intermolecular forces. The more branched structure has larger exposed surface and hence weaker dispersion intermolecular forces. The more branched structure has larger exposed surface and hence stronger dispersion intermolecular forces. The more branched structure has smaller exposed surface and hence stronger dispersion intermolecular forces.

Choose two of the following compounds and discuss the similarities and differences between the compounds.  Explain why their properties are different based on their physical structure.  Make sure you use diagrams and an explanation of intermolecular forces in your response.   HF Boiling point:  20°CCH2F2  Boiling point:  -52°C AsH3 Boiling point:  -80°C CH4 Boiling point:  -175°C

Which of the following compounds have hydrogen bonding intermolecular forces? CH3OH CH3F NH(CH3)2 CH4 CH3CH2OCH2CH3 CH3OH CH3F NH(CH32 and CH4 O CH3F NH(CH3)2 and CH3CH2OCH2CH3 CH3OH and NH(CH3)2 CH3OH, CH3F and NH(CH3)2 CH3OH CH3F NH(CH3)2 and CH3CH2OCH2CH3 CH4 All compounds have H-bonding: CH3OH CH3CH2OCH2CH3 CH3F NH(CH3)2

Which of the following gaseous substance would have the lowest solubility in water?   CO2 H2 NH3 O2

Compound I would have a higher or lower boiling point because the molecules can pack closer together and allow stronger or weaker intermolecular forces to form?

What are the possible intermolecular forces (IMF) that could exist in each of the following compounds (If there are more than one IMF, name them all). A. C₂H6 B. C₂H5OH C. HF

Determine the structure and type of intermolecular force for each of the following compounds CH₂Cl Intermolecular Forces C₂H₁

Place the following chemicals in order of INCREASING boiling points: H2O CH2Cl2 LiH CH4