N2(g) + 3 H2(g) → 2 NH3(g)Which of the following can be said about the reaction?Group of answer choicesThe reaction is nonspontaneous at any temperature.The reaction is spontaneous at low temperatures but not at high temperatures.The reaction is spontaneous at high temperatures but not at low temperatures.The reaction is spontaneous at all temperatures.Not enough information is given to answer the question.
Question
N2(g) + 3 H2(g) → 2 NH3(g)Which of the following can be said about the reaction?Group of answer choicesThe reaction is nonspontaneous at any temperature.The reaction is spontaneous at low temperatures but not at high temperatures.The reaction is spontaneous at high temperatures but not at low temperatures.The reaction is spontaneous at all temperatures.Not enough information is given to answer the question.
Solution
The reaction in question is the Haber process, which is the industrial synthesis of ammonia from nitrogen and hydrogen. This reaction is exothermic, releasing heat. According to the principles of thermodynamics, exothermic reactions are more likely to be spontaneous at lower temperatures. Therefore, the reaction is spontaneous at low temperatures but not at high temperatures.
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