ΔH for the following reaction is -431 kJ. Is the reaction endothermic or exothermic? Ba(s) + 2 H2O(l) –> Ba(OH)2(aq) + H2(g) Group of answer choicesexothermicendothermic
Question
ΔH for the following reaction is -431 kJ. Is the reaction endothermic or exothermic? Ba(s) + 2 H2O(l) –> Ba(OH)2(aq) + H2(g) Group of answer choicesexothermicendothermic
Solution
The reaction is exothermic. This is because the ΔH (change in enthalpy) for the reaction is negative (-431 kJ), which indicates that heat is being released by the reaction. In an exothermic reaction, the system loses heat to the surroundings, hence the negative sign. In contrast, an endothermic reaction would have a positive ΔH value, indicating that heat is being absorbed from the surroundings.
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