The student pilot was conducting his second solo flight. He reported that he felt a wind-shift to a light tailwind just prior to landing on runway 27L, and when the airplane touched down, it became airborne again. During the subsequent touchdown, the airplane landed hard and the nose gear collapsed. The airplane sustained substantial damage to the firewall. In addition, the propeller and left wing contacted the ground. No preaccident mechanical malfunctions or failures were found that would have precluded normal operation. The pilot reported 29 hours of total flight experience, which included 2 hours of solo flight time, all in the same make and model as the accident airplane. Winds reported at the airport, about the time of the accident, were from 160 degrees at 7 knots.