chemistry
posted by CHRIS on .
A reaction will be nonspontaneous under all conditions when
a. delta G is negative
b. delta H is negative and DS is positive
c. delta H is positive and DS is negative
d. delta H is positive independent of the value and sign of DS
e. delta S is positive independent of the value and sign of DH
?

dG = dH  TdS.
Go through each answer and see if it fits; for example, #1 can't be right because when dG is  the reaction is spontaneous.
#2.
If dH is  and dS is +, then the term TdS is  so dG is always  when this is true and the rxn is spontaneous. So scratch 2.
Etc. 
e?

e is not it.
dG = dH  TdS.
If dS is + then the term TdS will be negative but some dH values (even though they are + values) still can give a  dG value and the reaction will be spontaneous. 
so d then

no. c