QueenNerdy889 QueenNerdy889 26-03-2019 Biology contestada PLZ HURRY IT'S URGENT!!! This equation indicates that the reaction gives off heat. What is this type of reaction called? C3H8 +?O2 → 3CO2 + 4H2O + heat A. synthesis reaction B. endothermic reaction C. exothermic reaction D. decomposition reaction