The reduction of students' misconceptions on thermochemical material at SMA Negeri 4 Pekanbaru has been carried out by applying the inquiry learning model. The form of experimental research was designed with a randomized control group pretest-posttest. The test used (three tier multiple choice) with the Certainty of Response Index (CRI). Implemented in class XI MIPA 4 and XI MIPA 2. The experim…