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There’s two ways to figure this out. If the total entropy is positive then it is spontaneous. Also if the total Gibbs free energy is negative then it is also spontaneous. It is easier to tell spontaneity from gibbs free energy because it does not require us to know the entropy of the surroundings and the system it only requires us to know the entropy of the system.
GFolk_1D wrote:What is the significance of whether or not a reaction is spontaneous? How do we apply this is real-world situations?
If a reaction is spontaneous, then the reaction will proceed without intervention. This applies to real-world situations since figuring out if a reaction will proceed or not is important will commercially producing chemicals and other products
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