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JEE Main20206 Sep 2020Evening ShiftChemistryThermodynamics (C)Actual

For a reaction 4 M s + nO 2 g → 2 M 2 O n s The free energy change is plotted as a function of temperature. The temperature below which the oxide is stable could be inferred from the plot as the point at which :

Options

  1. Athe slope change from negative to positive
  2. Bthe free energy change show a change from negative to positive value
  3. Cthe slope changes from positive to negative
  4. Dthe slope changes from positive to zero

Correct answer

B. the free energy change show a change from negative to positive value

Step-by-step solution

For oxide to be stable its ΔG of formation value should be negative. Gibbs free energy, also known as the Gibbs function, Gibbs energy, or free enthalpy, is a quantity that is used to measure the maximum amount of work done in a thermodynamic system when the temperature and pressure are kept constant.

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