The desired relationship between the partial pressure of reactant and total pressure for the reaction N2O4 → 2NO2 is _____(a) PA = PA0 – 2(P – P0)(b) PA = 2PA0 – (P – P0)(c) PA = PA0 – (P – P0)(d) PA = PA0 + (P – P0)I have been asked this question in exam.My doubt stems from Stoichiometry topic in portion Rate Laws and Stoichiometry of Chemical Reaction Engineering

The desired relationship between the partial pressure of reactant and

1.	The desired relationship between the partial pressure of reactant and total pressure for the reaction N2O4 → 2NO2 is _____(a) PA = PA0 – 2(P – P0)(b) PA = 2PA0 – (P – P0)(c) PA = PA0 – (P – P0)(d) PA = PA0 + (P – P0)I have been asked this question in exam.My doubt stems from Stoichiometry topic in portion Rate Laws and Stoichiometry of Chemical Reaction Engineering
Answer» The correct choice is (C) PA = PA0 – (P – P0) To elaborate: ∆n = 2-1 =1. pA= pA0 – \(\FRAC{a}{∆n}\) (P – P0), a is the stoichiometry of the REACTANT. HENCE,PA = PA0 – (P – P0).

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