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    In my book it says that 'a process is spontaneous if a chemical system becomes more stable and its overall energy decreases', but it also says that 'some endothermic reactions also take place spontaneously'. I'm confused, doesn't energy increase in a system in an endothermic reaction?
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    (Original post by tammie94)
    In my book it says that 'a process is spontaneous if a chemical system becomes more stable and its overall energy decreases', but it also says that 'some endothermic reactions also take place spontaneously'. I'm confused, doesn't energy increase in a system in an endothermic reaction?
    A quick search online provides a solution.
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    What did you type into google I tried googling it but didn't find anything. Thanks for the link
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    (Original post by tammie94)
    In my book it says that 'a process is spontaneous if a chemical system becomes more stable and its overall energy decreases', but it also says that 'some endothermic reactions also take place spontaneously'. I'm confused, doesn't energy increase in a system in an endothermic reaction?
    A process is spontaneous if the gibbs free energy of the system decreases upon the chemical change.
    G has an enthalpy term and a entropy term. The entropy term is T dependant which is why you can get some endothermic reactions to proceed spontaneously if you heat them.
    Look up the expressions for G and you'll see what i mean.
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    (Original post by tammie94)
    What did you type into google I tried googling it but didn't find anything. Thanks for the link
    Spontaneous endothermic reaction?
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    (Original post by joostan)
    Spontaneous endothermic reaction?
    oh :colondollar:
 
 
 
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