Lecture 17 Question (IMF)

[Juliet Cushing_2H]

Around minute 40 Professor Lavelle lists a bunch of examples of interactions along with the "Energy" associated with them. Would anyone be able to explain what type of energy this is? Is it different than the dissociation energy he mentioned earlier? Thanks!

[Ria Nawathe 1C]

I believe Professor Lavelle mentioned it's the energy per mole of the given interaction. For example, if there was 1 mole of Na+ and Cl- interactions, the amount of energy released due to the ion-ion interactions would be 250 kJ.

[Evie Li_1H]

Pretty much what Ria said, the two ions Na+ and Cl- can't "sit" together (as Lavelle explained it) because they are just naturally attracted to each other. It doesn't require any energy for them to bond, which is why it's not a positive charge.

[Arya Adibi 1K]

The energy/mol is negative because it represents a force of attraction. This means that for an interaction that has -x kj/mol, it would take x kj/mol to break that interaction/force.