In this example question it says identify the type of force involved in the situations below as either intermolecular or intramolecular. Now remember, intermolecular forces are the non bonding forces that exist. They're really just the attractive forces that exist between molecules, not the actual bonds. Intromolecular does deal with the bonding forces, so we're talking about atoms connecting to each other.
So for the first one we have the condensation of water vapor. This just means that water's going from its gaseous face to its liquid phase. Here we have closer reactions between different water molecules with each other. We'd have closer attractive forces for one another, but we're not really making new bonds here, and so here this would be an intermolecular force.
Next we have the formation of ammonia through the combination of nitrogen and hydrogen combination. Here we're combining them. We're forming something new by taking N2 and H2 it to make NH3. So we're making new bonds. So this would be in trump molecule.
Next we have sugar dissolves in water here sugars polar, water is polar, but we're not really forming a brand new bond between sugar and water. They are dissolving into each other to make a solution here. So this would be an intermolecular force.
And then finally water flowing up the veins of a plant due to capillary action. Capillary action is actually a property that's the result of an intermolecular force. So this would be intermolecular. The hydrogen bonding that exists in water allows it to do this type of phenomenon where it's actually going to move up the roots, up the stems of a plant, so it can reach the top part of the plant and feed its leaves and the top portion of it, OK. So just remember, capillary action is one of those special properties that's a result of intermolecular forces.
