I think the point that's been missed above is the OP isn't 'just starting' - Tbody and Gucks, you're referencing newb gains. The OP COULD make this if his training has been sub par (which based on weight sounds like it was), however I wouldn't expect these types of gains.

I'd also be concerned about making a huge caloric jump just like that - your body may not be ready for this and could store bodyfat.

My best advice to you is this: don't worry about how much weight you might gain in X amount of months, etc. - just implement a proper diet and training regimen, make the best gains you can and BE CONSISTENT. As long as you make fairly steady gains, I'd be alot less concerned with how much I weighed.