A mixture of 3.00 mol of Cl2 and 2.10 mol I2 is initially placed into a rigid 1.00-L container at 350 °C. When the mixture has come to equilibrium, the concentration of ICl is 2.32 M. What is the equilibrium constant for this reaction at 350 °C? Cl2 (g) + I2 (g) ⇌ 2 ICl(g)

Kc =  [ICl]² / [Cl₂] . [I₂] →2.32² / 1.84 . 0.94 = 3.11

Explanation:

Let's propose the equilibrium reaction:

                 Cl₂(g)    +     I₂(g)      ⇄      2ICl(g)

Initial           3 m          2.10m                  -

React            x                x                     2x

X amount has reacted of chlorine and iodine, so by stoichiometry, we made 2X of ICl.

As we have this molar concentration we can determine the x → 2x = 2.32. Then x = 2.32/ 2 = 1.16

Eq         (3 m - 1.16)  (2.10-1.16)            2.32                

Molar concentrations in the equilibrium are: [Cl₂]= 1.84M, [I₂] = 0.94M

Let's make the expression for Kc:

Kc =  [ICl]² / [Cl₂] . [I₂] →2.32² / 1.84 . 0.94 = 3.11

The equilibrium constant is 3.11

Explanation:

Step 1: Data given

Number of moles Cl2 = 3.00 moles

Number of moles I2 = 2.10 moles

Volume = 1.00L

Temperature = 350 °C

Concentration of ICl at the equilibrium = 2.32 M

Step 2: The balanced equation

Cl2 + I2 → 2ICl

Step 3: Calculate initial concentrations

[Cl2] = 3.00 moles / 1L = 3.00 M

[I2] = 2.10 moles / 1L = 2.10 M

[ICl]= 0M

Step 4: Calculate concentration at equilibrium

[Cl2] = 3.00 - X M

[I2] = 2.10 - X M

[ICl]= 2X = 2.32 M

X = 2.32 / 2 = 1.16 M

[Cl2] = 3.00 - 1.16 M = 1.84 M

[I2] = 2.10 - 1.16 M = 0.94 M

[ICl]= 2X = 2.32 M

Step 5: Calculate Kc

Kc = [ICl]²/[Cl2][I2]

Kc = 2.32²/(1.84*0.94)

Kc = 3.11

The equilibrium constant is 3.11

answer; economic order quantity;

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.