How did Hannah Baker die in season 1?

This image appears in the gallery:
13 Reasons Why: Everything You Ever Wanted To Know About Hannah Baker

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 

10. 11 images

See the full gallery: 13 Reasons Why: Everything You Ever Wanted To Know About Hannah Baker