Often times, I find that the second chapter is more difficult to write than the first. The first chapter is used to get to know a little bit about your characters, to reveal the tiniest details about your plotline, and to kickstart the action. The second chapter usually wakes me up, slaps me on the face, and says, "Welcome to the real world."
I've narrowed down a few of the reasons why the second chapter is harder to write.
The story is really 'started', if you know what I mean. You've had your big sha-bang party as the first chapter, and now it's time to wake up and start writing. The more 'fun' part is done with, and you have to write (basically) a whole novel now. Not to say that after the first chapter is written, the rest is a chore... I'm not saying that at all! Writing is something that I enjoy immensely, and I often do it after I get my 'real' work done. You know... Geometry homework, chores, and all that jazz.
You have to get more into your character development, which is hard. Keeping track of details, is often times a chore, I'm not going to lie. But the character list that I gave you in Post #1 of My Character Crafting Series is awesome for keeping a straight record of the nitty-gritty details that everybody loses track of. Again, thank you, RWD, for such an awesome list!
You still have inspiration, it's just not as inspiring as when you wrote your first chapter. Like I said before, you've already introduced some people, and a little bit of your plotline... Now it's time to do the rest. And the second chapter is the first step in writing the rest of your novel.
Remember, you're not going to get a novel overnight. It just doesn't happen that way. It certainly would be nice if it did... But it doesn't. Please, please, please, if you've learned nothing from this post yet, please keep in mind the phrase "Take things in baby-steps". If you've seen a baby learning to walk, you probably know what I am talking about. The same thing goes for writing. As you learn to write, you will probably fall a few times, here and there. But as you get more and more sure of yourself, it will gradually begin to show itself in your writing! You CAN do it, just keep working!