H₂ and F₂ React According to the Following Equation,forming HF

question 89

Multiple Choice

H₂ and F₂ react according to the following equation,forming HF.
H₂(g) + F₂(g) → 2HF(g) ; ΔH° = -271 kJ
If H₂(g) and F₂(g) were mixed in a thermally insulated vessel,the reaction that occurred would be

• A)endothermic,and the temperature of the reaction system would fall.
• B)We could not tell unless the original and final temperatures were given.
• C)exothermic,and the temperature of the reaction system would fall.
• D)exothermic,and the temperature of the reaction system would rise.
• E)endothermic,and the temperature of the reaction system would rise.

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