I don't know how you would get to any of the ports without breaking the seal.
Also, how would you contain this vacuum? I think another comment said that the atmosphere would come down on it hard and it would need to be reinforced.
I would stick with 8th gen. 9th gen chips would normally require at least a Z390 board.
I would go with the B360-I, I don't know what the H310 is, but the B360 is something I know.
Pure distilled water normally does the trick, not a watercooling expert but I've seen lots and lots of people have their coolants gunk up their loop. DW is the one that won't gunk up your loop, and just make sure to flush every 1-2 months.
Too many variables to control and test to determine how long it would run, the chance of you spilling a drink into your PC and frying it, dropping it, power surge, theres too many to list.
I feel like the professors/students at least have a good grasp of what hardware/software is, and not say that your cpu has 4 cores.. when most modern CPU's have 6 - 8.
Intel wouldn't see a too bad of a difference with the speed, Ryzen would. I think 16gb at 3000MHZ would be fine, unless if youre going to start doing a lot more maybe of 3d modeling, and c++, you should go for 32gb.
Most overclocking is putting your power limit to the max, and slowly increasing the core clock/memory.
I'm not an overclocking expert, I would do some extra research.
EVGA has good VRM's, and I mean temperatures.
Most EVGA cards are built for overclocking, especially KingPin editions of some of the older cards. Your card isn't reference spec, it's an EVGA. Reference / Founders Edition means that it came from NVIDIA.
It most likely is better than the reference spec.