Contact hours vary vastly between unis and types of courses. I have 10 hours of lectures a week, plus 4-8 hours of workshops (similar to seminars)/practicals. And I do a science course. My mum studied history and in her 3rd year had 4 contact hours a week. But we both did/do a full time course, which means you should be spending ~35-40 hours a week (including contact time) studying, which meant my mum had to do more independent work.
As mentioned, contact time changes with the course and the university. I know some people who are in for a couple of hours a week. Some medical students are posting that they're not finishing until 8pm or so.
In engineering I'm in for around 16 hours a week (lows of 14, highs of 18-20) depending on what's going on. That's for 12 weeks in the first semester and 12 weeks in the second semester. There may be extra contact hours (2 weeks or so) for revision before or after the Easter holiday too.
The number really shouldn't matter too much though. You'll be in to do what you need to do.
As a vet student we have around 15-30 hours of contact time a week. Next year I will have 9-4 lectures every day of the week, and the practical rotations in the hospitals which will be longer hours still (and include out of hours & weekends too)
Just counting lectures, not including labs or supervisions, this year I have roughly 270 hours of lectures. I'm in third year though, and in previous years had more scheduled contact time each week, especially in first year. It also varies depending on the optional modules I've taken. Other modules spend a bit more time in lectures than the two I picked.