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ChemBench
Will this reaction happen on its own?
A negative ΔG means a reaction is thermodynamically spontaneous (it will proceed without outside energy input); a positive ΔG means it won't happen without help — this single calculation predicts reaction feasibility.
ΔG = ΔH − TΔS shows spontaneity is a balance: reactions that release heat (negative ΔH) or increase disorder (positive ΔS) are favored, and temperature controls how much the entropy term matters.
Molar mass of any chemical formula (e.g. H2O, C6H12O6, Ca(OH)2).
OpenPercent composition of an element within a chemical formula.
OpenSimplest whole-number ratio formula from elemental masses or percentages.
OpenPercent yield from actual and theoretical reaction yields.
OpenGibbs free energy
-20,200 J
What you entered
T × ΔS
298 × -100= -29800 JΔG = ΔH − TΔS
-50000 − -29800= -20200 JResult
Gibbs free energy: -20,200 J
ΔG is -20,200 J — negative, so this reaction is spontaneous.