MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryThermodynamics and ThermochemistryPrevious Year Questions
Enthalpy change for the reaction, 4H(g) 2H (g) → is – 869.6 kJ. The dissociation energy of H–H bond is (CBSE AIPMT 2011)
A.+217.4 kJ
B.– 434.8 kJ
C.–869.6 kJ
D.+434.8 kJ✓ Correct
Explanation
2 4H g 2H g ; 869.6kJ → 2 2 2H g 4H g ; 869.6kJ H g 2H g ; 869.6 / 2kJ 434.8kJ → →
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