We can’t forget entropy changes in the surroundings!
For spontaneous reactions in which a decrease in the entropy of the system occurs: must be outweighed by a concomitant increase in the entropy of the surroundings (DSuniv > 0)
For an exothermic process: qsys < 0, qsurr > 0, DSsurr > 0
For an endothermic process: qsys > 0, qsurr < 0, DSsurr < 0
The initial temperature of the surroundings affects the
magnitude of DSsurr.
DSsurr a -qsys
DSsurr a 1/T
and
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