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Thermodynamics — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThermodynamics1 Mark
MCQ
Which of the following is most likely to produce a spontaneous reaction?
  • A
    Negative Enthalpy
  • B
    Negative Entropy
  • C
    Positive Entropy
  • ✓
    Negative Enthalpy and positive Entropy
✓

Answer

Correct option: D.
Negative Enthalpy and positive Entropy
Explanation: (D) Negative Enthalpy and positive Entropy
For the spontaneous reaction, the negative enthalpy and positive entropy is most likely.
As for spontaneous reaction the value of ΔG must be negative.
Hence, as per formula, ΔG = ΔH − TΔS, So, if ΔH and ΔS are negative and positive respectively then the value of the ΔG must be negative whatever the temperature.

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