Between 8-10 hours a week depending upon semester. I had more time for the gym and found that I was more productive in the library than working from my room. Less contact hours than first year.
12 hours of lectures (6 modules, 2 lectures per week), then a 2/3 hour lab once a week roughly but sometimes more. I think this is slightly less than my first year timetable but more workload because I have more modules.