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Showing posts with label CHEMICAL EQUILIBRIUM:. Show all posts
Showing posts with label CHEMICAL EQUILIBRIUM:. Show all posts
Sunday, September 10, 2023

The thermodynamics equilibrium constant Kp for the homogeneous gaseous reaction is 10^-3. The standard Gibb's free energy change ∆G° for the reaction at 27°C. (Use R= 2 cal K ^−1 mol ^−1) is :

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ΔG^ o at 25^°C for the reaction 1/2N2(g) + 3/2H2(g) ⇋ 2NH3(g) is -11.392 kj mole^-1. Hence thermodynamics equilibrium constant is : he equilibrium constant for reaction is 10. (Use R=8.3 JK ^−1 mol ^−1)

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Answer key : 10^2

The dissociation equilibrium of a gas AB2 can be represented as : 2AB2(g) ⇋ 2AB(g) + B2(g) The degree of dissociation is "x" and is small compared to 1. The expression relating the degree of dissociation (x) with equilibrium constant Kp and total pressure P is.

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(A) (2KP/P)^1/2   (B) (KP/P)  (C) (2KP/P)  (D) (2KP/P)^1/3
Friday, September 8, 2023

The equilibrium constant for reaction is 10. What will be the value of ΔG o (R=8.314JK −1 mol −1 & T=300K)

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Relation between Kp and Kc:

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When concentration are expressed in terms of mole fractions. We know that partial pressure (P) = Mole fraction × Total pressure (Pt) ...
Thursday, September 7, 2023

In Homogeneous gaseous equilibrium, M(g) + 3N(g)--> 4P(g). Initial concentration of M is equal to that of N. If equilibrium concentrations of M and P are equal then what will be the value of KC?

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Sunday, September 3, 2023

For the equilibrium, PCl 5​ (g)⇌PCl 3​ (g)+Cl 2​ (g) at 298K, K=1.8×10 −7 .Calculate ΔG 0 for the reaction (R=8.314JK −1 mol −1 ).

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Equilibrium constant for the reaction given below is 2.0 × 10^-7 at 300 K. calculate standard Gibb's free energy change for the reaction PCl5 (g) --=--PCl3 (g) + Cl2 (g) also calculate standard entropy change if ∆H° = 28.40 Kj mole-1.

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Saturday, September 2, 2023

Gibb's free energy (∆G) and Equilibrium constant (Kc):

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The part f energy which is converted into usefull work called Gibb's free energy or Gibb's function.   Energy (H) = Useful work (G) ...

Factor's Affecting Equilibrium Constant

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(1) Le-Chetelier'e principle (i) Effect of change in  temperature (ii) Effect of change in  concentration  (iii) Effect of change of vol...

Application of Equilibrium Constant (K):

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(1) Predicting extent of reactions (2) Predicting of stability of reactants and products (3) Predicting direction of reactions at any instan...
Tuesday, August 29, 2023

Relation between Kp and Kc and Law of Mass of action: Equilibrium constants:

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LAW OF MASS ACTION:  Law of mass action is applicable for only reversible chemical reactions and it is an imperial law. The law state that “...

The chemical equilibrium constant Kc for the decomposition of PCl5 is 0.0625 mole L^-1 at 300^C. What will be the value of Kp is ?

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The value of Kc for the reaction (formation of ammonia by haber process) is 0.50 at 400º C.What will be the value of Kp at 400ºC when concentration are expressed in mole litre.1 and pressure in atmosphere ?

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SOLUTION: 

For the reaction N2(g) + 3H2(g) ⇌ 2NH3(g) The Kp is 4.3 × 10^-4 at 375°C. Calculate Kc for the reaction. ?

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SOLUTION:

Methanol (CH3OH) is manufactured industrially by the reaction CO(g) + 2H2(g) ⇌ CH3OH(g) The equilibrium constant (Kc) for the reaction is 10.5 at 220°C. What is the value of Kp at this temperature ?

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  SOLUTION:   Give Data , K c = 10.5 ,T= 220 oC  = (220 + 273)K = 493 K

At 700 K, the equilibrium constant Kp, for the reaction, dissociation of Sulphur trioxide to Sulphur dioxide is 1.8 × 10^3 kPa What is the numerical value of Kc for this reaction at the same temperature

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SOLUTION:

Relation Between vapour density and degree of dissociation : Theory and Numericals:

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  (1)  Ammonium carbamate when heated to 200 °C gives a mixture of NH3​ and CO2​ vapour with a density of 13. What is the degree of dissocia...

Ammonium carbamate when heated to 200 °C gives a mixture of NH3​ and CO2​ vapour with a density of 13. What is the degree of dissociation of ammonium carbamate?

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The observed molecular weight of N 2​O4​ is 80 g mol^−1 at 350 K. The percentage of dissociation of N2​O4​ (g) at 350 K is ?

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