Help! having trouble with college question

[MadApprentice]

Ok, i have read my text book, and have consulted with tradesmen and my boss. But the smart mouth college teacher still wasnt happy with my result

We had to explain the effects of 5 different states on a refrigeration system. I know i should have this covered but i work on A/C and this is just making me not want to do refrigeration anymore!

We have to comment on the effects of having a normal system compared to having a blocked condenser, a blocked evaporator

I nailed these two situations, but the next two just have me stumped. What effect does having a high superheat have on the system?

And what effect does having a low superheat have on the system (looking at the tx valve mainly but they want a system overview)

Could people out there please explain to me these last two question and this teacher keeps flapping on about mass flow rate

Help is appreciated

Mad Apprentice