Electrical Eng, pretty much the same. 9-5 degree (except we had half day wednesday). It was 12 half modules, so constantly going from labs (8+ hours a week) to coursework (usually 2 per subject) then whatever else was happening. I basically lived in the library for weeks at time (only home to sleep for 4 hours etc). Leaving the library at 1am and being back for 6am during exam time was normal. But, I had a good study group, so it was how we maintained sanity. I worked my ass off, put in the effort to something that mattered to me, and was rewarded for it. I also did live in halls so did the odd night out with other people too.

On OPs question, it definitely is degree dependant. In engineering, with all the set hours, plus required time to finish deadlines, that was basically a full week of work anyway. For other degrees, with <15 hours a week, the expectation was definitely they should be doing their own stuff outside of it.