Answer: a. ENDOTHERMIC reaction b. kJ -1 attachment Consider the following reaction: CH. (9) + 2 02 (g)→ CO2 (g) + H20(g) AH= -890 kJ a. Is the reaction endothermic or exothermic? b. How much heat is given off by the reaction of 3.5mol CH4? c. How much heat is given off by the reaction of 40.0 gram of O2?

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