Assertion: For every chemical reaction at equilibrium,the standard Gibbs energy change is zero.
Reason: At constant temperature and pressure,a chemical reaction is spontaneous in the direction of decreasing Gibbs energy.

  • A
    Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
  • B
    Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
  • C
    Assertion is correct but Reason is incorrect.
  • D
    Assertion is incorrect but Reason is correct.

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Similar Questions

The correct relationship between the standard free energy change in a reaction and the corresponding equilibrium constant $K_c$ is:

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At $300 \ K$,for the reaction $PCl_{5(g)} \rightleftharpoons PCl_{3(g)} + Cl_{2(g)}$,the equilibrium constant $K_p = 1.8 \times 10^{-7}$. Calculate its standard Gibbs free energy change $\Delta G^0$.

At $60^{\circ} C$,dinitrogen tetroxide is $50 \%$ dissociated. Find its standard free energy change at this temperature and $1 \ atm$. [ Given: $\log 1.33 = 0.1239 ]$

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