Chances are you would not survive but lets explore this a bit more in depth for the sake of education.
This article from popular mechanics explores the very issue. There is some research that has gone into the topic of hitting the ground but the research is rarely about cases from the height you are asking about (~30,000ft). Some relevant info
First off at that altitude you really can't breathe that effectively so hypoxia will be your first concern followed closely by extreme cold.
Studies of bridge-jump survivors indicate that a feet-first,
knife-like entry (aka "the pencil") best optimizes your odds of
Hitting the ground:
The question of how to achieve ground contact remains, regrettably,
given your predicament, a subject of debate. A 1942 study in the
journal War Medicine noted "distribution and compensation of pressure
play large parts in the defeat of injury." Recommendation: wide-body
impact. But a 1963 report by the Federal Aviation Agency argued that
shifting into the classic sky diver's landing stance—feet together,
heels up, flexed knees and hips—best increases survivability.
Your best bet for surviving the airplane break up is if you are stuck in a situation similar to that of Vesna Vulović who did survive the situation you describe. Unfortunately there is some debate as to what actually happened so take the info at face value.
“Speed has never killed anyone. Suddenly becoming stationary, that's
what gets you.” ― Jeremy Clarkson