thubby
2011-12-03, 09:22 AM
this problem has been killing me since class. at this point i just need outside input:
a)calculate (delta)S(rxn) of:
x+y->2Z
(standard entropies: x=131, y=223, z=187)
b) if the (delta)H(rxn) of the above reaction=180.6, calculate the entropy change of the surroundings and system. then predict whether or not [reaction] is spontaneous
__________________________________________________ ________
a) now, i know its just products minus reactants, so (delta)S(rxn) is 20 j/k*mol
b)i also know (delta)S(surroundings)=-(delta)H/T
my problem is, is the S of the system the S of the reaction? (in this case 20)
and if it is, that would mean it would only be spontaneous at high temperature?
a)calculate (delta)S(rxn) of:
x+y->2Z
(standard entropies: x=131, y=223, z=187)
b) if the (delta)H(rxn) of the above reaction=180.6, calculate the entropy change of the surroundings and system. then predict whether or not [reaction] is spontaneous
__________________________________________________ ________
a) now, i know its just products minus reactants, so (delta)S(rxn) is 20 j/k*mol
b)i also know (delta)S(surroundings)=-(delta)H/T
my problem is, is the S of the system the S of the reaction? (in this case 20)
and if it is, that would mean it would only be spontaneous at high temperature?