Question

The reaction ${ 2A_{(g)} + B_{(g)} <=> 3C_{(g)} + D_{(g)}}$ is begun with the concentrations of $A$ and $B$ both at an intial value of $1.00\, M$. When equilibrium is reached, the concentration of $D$ is measured and found to be $0.25 \,M$. The value for the equilibrium constant for this reaction is given by the expression.

• A. $[(0.75)^3 (0.25)] \div [(0.50)^2 (0.75)]$
• B. $[(0.75)^3 (0.25)] \div [(0.50)^2 (0.25)]$
• C. $[(0.75)^3 (0.25)] \div [(0.75)^2 (0.25)]$
• D. $[(0.75)^3 (0.25)] \div [(1.00)^2 (1.00)]$

Answer 1

The Correct Option is A

The correct option is(A): \([(0.75)^3 (0.25)] \div [(0.50)^2 (0.75)]\)

Given, 
(I)\(F{{e}_{2}}O(s)+3CO(g)\xrightarrow[{}]{{}}2Fe(s)+3C{{O}_{2}}(g);\)
\(\Delta H=-26.8\,\text{kJ}\) 
(II)\(FeO(s)+CO(g)\xrightarrow[{}]{{}}Fe(s)+C{{O}_{2}}(g);\)
\(\Delta H=-16.5\,\text{kJ}\) 
On multiplying Eq (II) with 2, we get 
(III) \(2FeO(s)+2CO(g)\xrightarrow[{}]{{}}2Fe(s)+2C{{O}_{2}}(g);\)
\(\Delta H=-33\,\text{kJ}\) 
On subtracting Eq (III) from I, we get 
\(F{{e}_{2}}{{O}_{3}}(s)+CO(g)\xrightarrow[{}]{{}}2FeO(s)+C{{O}_{2}}(g);\)
\(\Delta H=-26.8-(-33)\)
\(=+6.2\,\text{kJ}\)

Answer 2

Ans. Chemical equilibrium is the cThe number of integer value(s) of k for which the expression x^2-2(4k-1)x+15k^2 -2k-7>0 for every real number x is/areondition of a system in which the parameters of the system remain stable and neither the reactant concentration nor the product concentration changes over time. The system enters the condition of chemical equilibrium when the rate of the forward reaction equals the rate of the backward reaction. The system is said to be in a state of dynamic equilibrium if the concentrations of the reactants and products do not change further as a result of the equal rates of the forward and reverse processes.

Chemical equilibrium is the condition of a system where the concentrations of the reactant and the products do not fluctuate over time. The forward reaction rate and the reverse reaction rate are equal in a condition of chemical equilibrium. When the system reaches equilibrium, its characteristics do not show any further change.

A forethought is a graph with the time on the coordinate axis, usually known as the y-axis, and the concentration on the coordinate axis, commonly known as the x-axis. Chemical equilibrium is reached when the concentration of each reactant and product stops changing.

Chemical Equilibrium is helpful in several industrial processes like,

Preparation of Ammonia by Haber’s Process: In this N (nitrogen) combines with a chemical element to create ammonia, the yield of ammonia is a lot more at high temperatures, pressure, and within the presence of iron as a catalyst.

Preparation of Acid by Contacts Method: In this process, the elemental reaction is the chemical reaction of pollutants into sulfur oxide. This involves chemical equilibrium.