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Suppose a scientist made a claim that all spontaneous reactions are exothermic. whic of the following would provide the strongest challenge to their claim? suppose a scientist made a claim that all spontaneous reactions are exothermic. which of the following would provide the strongest challenge to their claim?
a. an exothermic reaction which is not spontaneous
b. an endothermic reaction that only proceeds when coupled to an exothermic reaction
c. an endothermic reaction that only proceeds when a catalytst is present
d. an endothermic reaction which is not spontaneous
e. all of the above
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