2. Questions Bank
  3. NEET
  4. Chemistry
  5. Thermodynamics / रासायनिक उष्मागतिकी

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

  • question_answer
    For the reaction \[CO(g)+\frac{1}{2}{{O}_{2}}(g)\xrightarrow{{}}C{{O}_{2}}(g),\Delta H\], and \[\Delta S\] are \[-283\text{ }kJ\] and \[-87\text{ }J{{K}^{-1}}\], respectively. It was intended to carry out this reaction at 1000, 1500, 3000 and 3500 K. At which of these temperatures would this reaction be thermodynamically spontaneous?

    A) 1500 and 3500 K

    B) 3000 and 3500 K

    C) 1000, 1500 and 3000 K

    D) 1500, 3000 and 3500 K

    Correct Answer: C

    Solution :

    [c] \[\therefore \Delta G=\Delta H-T\times \Delta S\] For a spontaneous reaction, \[\Delta G\] should be negative \[\Delta H=-238kJ,\text{ }\Delta S=-87J{{K}^{-1}}\] Hence, reaction will be spontaneous when\[\Delta H>T\times \Delta S\]. Therefore, at 1000, 1500 and 3000 K the reaction would be spontaneous.


You need to login to perform this action.
You will be redirected in 3 sec spinner