“it's miles a measurable physical property this is maximum commonly related to uncertainty”
In simple phrases, it’s the diploma of disorder or uncertainty in a system. consistent with the second one regulation of thermodynamics, the disease of a device continually will increase. Entropy is the measure of this disorder.
Entropy may be very helpful in determining the spontaneity of a response. A spontaneous reaction does now not involve any out of doors strength to show up and alternatively, a non-spontaneous requires a few strength from the outside supply.
via the usage of the entropy exchange and the Gibbs loose power you can decide the spontaneity of the chemical reactions.
The equation for entropy is outlined below:
\(\ ΔS_{reaction} = \ ΔS_{products} − ΔS_{reactants}\)
ΔG = ΔH - (T * ΔS)
in which
For quantity:
\(\ ΔS = n*R*ln\ (\dfrac{V_2}{V_1})\)
For Pressure:
\(\ ΔS = n*R*ln\ (\dfrac{P_2}{P_1})\)
Where
Observe the under mentioned steps:
Calculate Entropy alternate for a response
where,
\(\ ΔS_{products} = \ Total\ entropy\ of\ products\) = 20 J/mol*K
\(\ ΔS_{reactants} = \ Total\ entropy\ of\ reactants\) = 30 J/mol*K
Solution:
\(\ ΔS_{reaction} = \ ΔS_{products} − ΔS_{reactants}\)
\(\ ΔS_{reaction} = \ 20 − 30\)
\(\ ΔS_{reaction} = \ -10\)
