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  4. Energy of activation of forward reaction for an endothermic process is 50 kJ. If enthalpy change for forward reaction is 20 kJ then enthalpy change for backward reaction will be

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Q. Energy of activation of forward reaction for an endothermic process is $50\, kJ$. If enthalpy change for forward reaction is $20 \,kJ$ then enthalpy change for backward reaction will be

AIIMSAIIMS 2013Chemical Kinetics

Solution:

For endothermic reaction,

$E_{a,\,b} = E_{a,\,f } -\Delta H^{\circ}$

$= 50\, kJ\, - 20\, kJ\, = 30\, kJ$

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