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Enthalpy diagram for a particular reaction is given in Fig. 6.3. Is it possible to decide spontaneity of a reaction from given diagram. Explain.
Answers (1)
No, for the state of spontaneity, the enthalpy change is not the only criteria. Entropy also needs to be taken into account here.
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The change in entropy (ΔS) is the best indicator of a reaction's spontaneity. The Second Law of Thermodynamics states that a reaction is spontaneous if entropy increases. Entropy measures the amount of energy dispersed during a process.
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Enthalpy: Enthalpy is the sum of a system's internal energy, pressure, and volume. Enthalpy change (ΔH) can also increase or decrease randomness by affecting molecular motions.
View full answer
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