Gibbs Free Energy

If ?H is negtive

?S is postive

 

The rxn will be?

spontaneous at all temperatures

 

?G=?H-T?S

(-3) – (298k)(5)

neg answer

heat is released, is already disordered

If ?H is (+)

?S is (-)

 

The rxn will be?

NONspontaneous at all temperatures

 

?G=?H-T?S

(+3)-(298)(-3)

3- (-894)

=+ 897

a very POSITVE Gibbs = bad

If ?H is (+)

?S is (+)

 

The rxn will be?

If ?H is (+): energy absorbed (endothermic)

If ?S is (+): energy is absorbed 

(b/c Q/T is postive)

If ?H is (-)

?S is (-)

 

The rxn will be?

spontaneous at LOW temps

If ?H is (-): exothermic (doesnt need extra heat)

if?S is (-): energy being released

if a reaction is spontaneous is it fast?
Not neccessarily, a slow rxn can still be spotaneous (without any energy output)
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