TestUstad

For N2 + 3H2 ⇌ 2NH3; ∆H = Negative, then

Correct answer: B. Kp = Kc (RT)-2

  • A. Kp = Kc
  • B. Kp = Kc (RT)-2
  • C. Kp = Kc RT
  • D. Kp = Kc (RT)-1

Explanation

Option B is correct.In the reaction N2 + 3H2 <=> 2NH3. There are 4 moles of gas on the reactants side and 2 moles of gas on the products side. This means that Δn = -2. Substituting the values of Δn and R into the equation, we get: Kp = Kc(RT)-2 Therefore, the equilibrium constant, Kp, is equal to the equilibrium constant, Kc, multiplied by the square of the product of R and temperature. In conclusion, for the reaction N2 + 3H2 <=> 2NH3, Kp = Kc (RT)-2.

Written and checked by , M.Phil ChemistryLast updated
Report an error

The more specific you are, the faster it gets fixed. A source beats an opinion.

Prefer email? [email protected]

About Chemical Equilibrium

Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.

Practise Chemical Equilibrium

625 free Chemical Equilibrium MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Start a free Chemical Equilibrium testAll Chemical Equilibrium MCQs

Discussion

Stuck on an option, or know a faster way to get there? Ask or explain it here.

No comments yet. Be the first to explain this one.

Exams that ask Chemistry questions like this

Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

Lecturer Chemistry Test Chemistry80 MCQsSubject Specialist Chemistry Test Chemistry80 MCQsDUHS Chemistry45 MCQsETEA MDCAT Chemistry45 MCQsKMU Chemistry45 MCQsMDCAT Chemistry45 MCQsNUMS Chemistry40 MCQsECAT Chemistry30 MCQsETEA Engineering Admission Test Chemistry30 MCQsGIKI Chemistry30 MCQsNED Chemistry30 MCQsNET Chemistry30 MCQsPIEAS Chemistry30 MCQsBSN Entry Test Chemistry25 MCQs

More Chemical Equilibrium questions

For the reaction N2 + 3H2 ⇌ 2NH3 in a vessel, after the addition of equal number of moles of N2 and H2, equilibrium state is formed. Which of the following is correct?

Just before a reversible reaction attains equilibrium it is found that

Rate at which a reaction proceeds is directly related to the

The equilibrium constant of a reversible chemical reaction at a given temperature

At a constant temperature the concentration of a reactant is increased at equilibrium, the equilibrium constant

A certain buffer solution contains equal concentration of salt and acid. ,The Ka for salt is 10-10. The pH of the buffer is: