Problem: Consider the following reaction between hydrogen sulfide (H2S) gas and oxygen (O2) gas. 2 H2S(g) + 3 O2(g) → 2 H2O(g) + 2 SO2(g) Using standard enthalpies of formation, calculate the standard enthalpy change for this reaction. _____ kJ/mol Is this reaction endothermic or exothermic? a. endothermic b. exothermic

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Consider the following reaction between hydrogen sulfide (H2S) gas and oxygen (O2) gas. 

2 H2S(g) + 3 O2(g) → 2 H2O(g) + 2 SO2(g) 

Using standard enthalpies of formation, calculate the standard enthalpy change for this reaction. 

_____ kJ/mol 

Is this reaction endothermic or exothermic? 

a. endothermic 

b. exothermic

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