Thermodynamics

  • Question
    CBSEENCH11008107

    For a particular reversible reaction at temperature T, ΔH and ΔS were found to be both +ve. If Te is the temperature at equilibrium, the reaction would be spontaneous when 

    • Te>T

    • T >Te

    • Te is 5 times T

    • T=Te

    Solution

    A.

    Te>T

    For a particular reversible reaction at T temperature
    ΔG = ΔH-TΔS
    When ΔH, S is positive
    ΔG = +ΔH- T (+ΔS)
    For a spontaneous process, ΔG must be negative, it is possible only at high temperature.
    That mean T> Te

    Delhi University

    NCERT Book Store

    NCERT Sample Papers

    Entrance Exams Preparation