Hey! I'm planning on studying computer science next year aswell and dell has some really good laptops, I have one coming tomorrow as we speak haha.
Mine cost £749 (was on sale)
and has:
8GB Ram
i7 8565H processor
Has a graphics card (but mostly because I want to also be playing games like gta on it)
1.92kg
and 128GB SSD along with 1TB HDD
BTW, u are really gonna want atleast 512 of SSD or save up whilst using an external hard drive while doing the course to get the best performance while running programs, and the i5 you found sounds pretty sweet :O
Although I don't know much about study hours and stuff, I did alot of research about laptops and the ones you would need for a computer science degree.
Some people even opt into taking a hceap laptop to lectures and keeping a powerful desktop in their room because they find it more efficient.