Relationship between Equilibrium Constant (K), Reaction Quotient (Q) and Gibbs Energy (G)

IMPORTANT

Relationship between Equilibrium Constant (K), Reaction Quotient (Q) and Gibbs Energy (G): Overview

This topic consists of various concepts like Relationship between Equilibrium Constant (K), Reaction Quotient (Q) and Gibbs Free Energy Change (ΔG),,, etc.

Important Questions on Relationship between Equilibrium Constant (K), Reaction Quotient (Q) and Gibbs Energy (G)

MEDIUM
IMPORTANT

The Haber’s process for the formation of  NH 3 at 298 K is N2+3H22NH3;ΔH=46.0KJ. Which of the following is the correct statement?

EASY
IMPORTANT

A schematic plot of ln   K eq versus inverse of temperature for a reaction is shown below

Question Image

The reaction must be –

EASY
IMPORTANT

The value of equilibrium constant for a reversible reaction is 3×10-2, If the reaction quotient for the same reaction is 5×10-3, predict the direction of equilibrium reaction.

HARD
IMPORTANT

In a one-litre flask, 6 moles of A undergoes the reaction A( g)P( g). The progress of product formation at two temperatures (in Kelvin), T1 and T2, is shown in the figure:

Question Image

If T1=2T2 andΔG2o-ΔG1o=RT2lnx , then the value of x is
[ ΔG1o and ΔG2o are standard Gibb's free energy change for the reaction at temperatures T1 and T2, respectively.]

HARD
IMPORTANT

The value of log K for the reaction AB at 298 K is _______. (Nearest integer)

Given: ΔH°=-54.07 kJ mol-1

ΔS°=10JK-1 mol-1

(Taken 2.303×8.314×298=5705 )

HARD
IMPORTANT

Derive the relationship between Equilibrium Constant (K), Reaction Quotient(q) and Gibbs Energy(G).

HARD
IMPORTANT

Give the relationship between equilibrium constant (k), reaction Quotient (Q), and Gibbs energy (G) 

MEDIUM
IMPORTANT

For a sponatneous reaction the value of G0 must be negative, and the value of Keq must be greater than _____

(Given G0=-RT lnKeq)

MEDIUM
IMPORTANT

What is the (approx) partial pressure of CO2at equilibrium at 427°C?

CaCO3sCaOs+CO2g   G=-13.5 kJ

MEDIUM
IMPORTANT

ΔfGo at 500 K  for substance 'S' in liquid state and gaseous state are +100.7 kcal mol1 and +103 kcal mol1, respectively.

 Vapour pressure of liquid 'S' at 500 K  is approximately equal to: (R=2 cal K1mol1).

HARD
IMPORTANT

What is the logKeq of the following reaction?

Question Image ΔG°=-0.10 kJ mol-1

HARD
IMPORTANT

CuSO4.5H2O sCuSO4.3H2O s+2H2O g     Kp=0.4×10-3 atm2
Which of the following is not true for the above equilibrium?

MEDIUM
IMPORTANT

Which of the following options will be correct for the stage of half completion of the reaction A  B?

HARD
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At 60C, 50% of N2O4g is dissociated to NO2g. What is the approximate standard Gibbs free energy change at 60C and 1 atm pressure for this process? R=8.314 J K-1 mol-1.

MEDIUM
IMPORTANT

The Haber’s process for the formation of  NH 3 at 298 K is N2+3H22NH3;ΔH=46.0KJ. Which of the following is the correct statement?

MEDIUM
IMPORTANT

Select the correct option about ΔG for the following reaction

H2Ol(2 atm,373 K)H2Og (2 atm,373 K)

(Given: 0.0821×373×ln2=21.23 L atm, molar volume of water at 2 atm, 373 K=18 ml)

MEDIUM
IMPORTANT

ΔGo=+ 63.3 kJ for the reaction Ag2CO3s2Ag+aq+CO3-2aq
the thermodynamic equilibrium constant at 25oC is:

HARD
IMPORTANT

Select the graph which can be used to determine standard free energy of the reaction given below:

CaCO3(s)CaO(s)+CO2(g)
Assume that the reaction is at equilibrium.

EASY
IMPORTANT

Among the following set of conditions, which condition necessarily holds true for a non-feasible process?
(Where, K=equilibrium constant)