Question

A reaction spontaneous if

Answer 1

A spontaneous reaction is a reactionthat occurs in a given set of conditions without intervention. 
Spontaneous reactions are accompanied by an increase in overall entropy, or disorder. ... 

If the Gibbs Free Energy is negative, then the reaction is spontaneous, andif it is positive, then it is nonspontaneous....



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Answer 2

A spontaneous reaction is a reaction that favors the formation of products at the conditions under which the reaction is occurring. A roaring bonfire is an example of a spontaneous reaction, since it is exothermic (there is a decrease in the energy of the system as energy is released to the surroundings as heat