Suggest why the boiling point
of the starting liquid will
change with time.

Explanation:

Think about it like this: if you have liquid under atmospheric pressure, it takes quite a bit of energy to get that liquid to excite and turn to gas. However, if it was 2x atmospheric pressure, it would take a lot more energy to excite the molecules in the liquid because there are more molecules pushing down on the liquid.

explanation:

detials on each model with digrams

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."