Sounds like a seal, hose, hard-line or even the compressor may have let go. A visual inspection should show you exactly what happened. Start by following the ac hoses under the hood, you should see oil around the area that is ruptured.
Alex
RepairPal Certified shops can diagnose and repair your 2009 Chrysler PT Cruiser. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.