|Mar18-13, 10:59 AM||#1|
Entropy Variation - System, Neighborhood and Universe
I learned ΔSuniv = ΔSsys + ΔSneib
If ΔSuniv > 0 the process is spontaneous.
But ΔS = Q/T right? Shouldn't Qsys = -Qneib? (The heat released by the system = - heat released by the neighborhood)
I cannot understand why this is wrong!
If it were the case, ΔSuniv would be always zero
Can anyone help me?
|Mar18-13, 02:01 PM||#2|
##\Delta S=Q/T## only for reversible processes.For irreversible processes, ##\Delta S>Q/T##.
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