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NEET Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank Self Evaluation Test - Thermodynamics

  • question_answer
    A reaction is spontaneous at low temperature but non-spontaneous at high temperature. Which of the following is true for the reaction?

    A) \[\Delta H>0,\,\Delta S>0\]        

    B) \[\Delta H<0,\text{ }\Delta S>0\]

    C) \[\Delta H>0,\,\Delta S=0\]        

    D) \[\Delta H<0,\,\Delta S<0\]

    Correct Answer: D

    Solution :

    [d] We know that \[\Delta G=\Delta H-T\Delta S\] When \[\Delta H<0\] and \[\Delta S<0\] then \[\Delta G\]will be negative at low temperatures (positive at high temperature) and the reaction will be spontaneous.


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