6) For each of the following pure substances, indicate the...

6) For each of the following pure substances, indicate the intermolecular forces present in each, and indicate which intermolecular force is going to dominate: H2O HCN Ar PF5 Cl2 BrCl5 CH2Cl2 CH3COH

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Transcript

00:02 Hi there.

00:03 In this question, we have the molecule, cl2, co.

00:10 And we want to know the intermolecular forces that we would find in this.

00:17 So the intermolecular forces include the dispersion forces, the dipole -dipole, and hydrogen bonding.

00:26 Dispersion forces are found between all molecules.

00:32 However, they are the only ones found in non -polar molecules.

00:36 Dipole -dipole, are the intermolecular forces found between polar molecules, and hydrogen bonding is a special type of dipole -dipole interaction, and it is found between polar molecules having o to h bonds, n -to -h bonds, or f -to -h bonds.

01:25 Okay, so that summarizes our three types of intermolecular forces and where we find them.

01:30 For this molecule that we have, let's draw out its structure.

01:35 Let's see, we're going to have a carbon that is double bonded to the oxygen, and that it's going to be single bonded to each of the chlorines.

01:51 So it's going to look like this.

01:57 Okay, so we need to figure out if this molecule is polar or not.

02:02 Well, as we look at electro -negativities, carbon has an electronegativity of 2 .5.

02:11 Whereas the oxygen is 3 .5, and each chlorine is 3 .0.

02:21 So we definitely have polar bonds here...

Question

6) For each of the following pure substances, indicate the intermolecular forces present in each, and indicate which intermolecular force is going to dominate: H2O HCN Ar PF5 Cl2 BrCl5 CH2Cl2 CH3COH

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