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A potential energy diagram is shown

What is the total change in enthalpy of this reaction?

A potential energy diagram is shown What is the total change in enthalpy of this reaction class=

Respuesta :

Given↷

  • PE of products⇢ 55kJ
  • PE of reactants⇢30kJ
  • Activation energy⇢65kJ

To find↷

  • Total change in enthalpy of the reaction

Answer↷

  • 25kJ

Solution↷

we know that,

AᵣH = (Sum of enthalpies of products)-(Sum of enthalpies of reactants)

AᵣH = 55kJ - 30 kJ

AᵣH = 25kJ

or

AᵣH =( Activation Energy-Reactant energy) +( Activation Energy-product energy)

AᵣH =(65kJ -30kJ) +(65kJ-55kJ)

  • Since there's a degrade , we'll consider the PE of product as -ve

AᵣH = 35kJ - 10kJ

AᵣH = 25kJ

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