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JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank Bond energy

  • question_answer
    Energy required to dissociate 4 gm of gaseous hydrogen into free gaseous atoms is 208 kcal at \[{{25}^{o}}C\]. The bond energy of \[H-H\] bond will be [CPMT 1989; MP PET 2000; J & K 2005]

    A)                 104 kcal               

    B)                 10.4 kcal

    C)                 1040 kcal             

    D)                 104 cal

    Correct Answer: A

    Solution :

              \[4g\,{{H}_{2}}=2\]moles. Bond energy for 1 mole of \[{{H}_{2}}=208/2=104\,\,kcal.\]


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