Chemistry, 06.07.2019 19:00 maddy6882

At 2000 ∘c the equilibrium constant for the reaction 2no(g)⇌n2(g)+o2(g) is kc=2.4×103. you may want to reference (pages 641 - 644) section 15.6 while completing this problem. part a if the initial concentration of no is 0.175 m, what is the equilibrium concentration of no? g

Answers: 1

Show answers

Answers

Answer from: kmc3490

The equilibrium concentration of NO is $\boxed{{\text{0}}{\text{.0018 M}}}$ .

Further Explanation:

Chemical equilibrium is a stage where the rate at which forward reaction proceeds becomes equal to the rate at which the backward reaction occurs. At equilibrium, the formation of product from reactant gets balanced out by the formation of reactants from products so there is no change in concentrations of both reactants and products.

The expression for a general equilibrium is,

$a{\text{A}} + b{\text{B}} \rightleftharpoons c{\text{C}} + d{\text{D}}$

Here,

A and B are the reactants.

C and D are the products.

a and b are the stoichiometric coefficients of reactants.

c and d are the stoichiometric coefficients of products.

The expression for the equilibrium constant for the general reaction is as follows:

${K_{\text{c}}}=\dfrac{{{{\left[ {\text{C}} \right]}^c}{{\left[ {\text{D}} \right]}^d}}}{{{{\left[ {\text{A}} \right]}^a}{{\left[ {\text{B}} \right]}^b}}}$

Here,

${K_{\text{c}}}$ is the equilibrium constant.

[C] is the concentration of C.

[D] is the concentration of D.

[A] is the concentration of A.

[B] is the concentration of B.

The given reaction occurs as follows:

$2{\text{NO}}\left( g \right) \rightleftharpoons {{\text{N}}_2}\left( g \right) + {{\text{O}}_{\text{2}}}\left( g \right)$

The initial concentration of NO is 0.175 M. Let x to be the change in concentration at equilibrium. Therefore, the concentration of NO becomes 0.175-2x at equilibrium. The concentration of both ${{\text{N}}_{\text{2}}}$ and ${{\text{O}}_{\text{2}}}$ become x at equilibrium.

The expression of ${K_{\text{c}}}$ for the above reaction is as follows:

${K_{\text{c}}}=\dfrac{{\left[ {{{\text{N}}_2}} \right]\left[{{{\text{O}}_2}} \right]}}{{{{\left[ {{\text{NO}}} \right]}^2}}}$ …… (1)

Substitute x for ${{\text{N}}_{\text{2}}}$ , x for ${{\text{O}}_{\text{2}}}$ , 0.175-2x for [NO] and $2.4 \times {10^3}$ for ${K_{\text{c}}}$ in equation (1).

$2.4 \times {10^3} = \dfrac{{\left( {\text{x}}\right)\left({\text{x}} \right)}}{{{{\left( {0.175 - 2x}\right)}^2}}}$ …… (2)

Solve for x,

${\text{x}} = 0.0866$

Or,

${\text{x}} = 0.0884$

The value of ${\text{x}} = 0.0884$ is rejected as it makes concentration of NO negative that is not possible. So the value of x is 0.0866.

The concentration of NO at equilibrium is calculated as follows:

$\begin{aligned}\left[ {{\text{NO}}} \right]&= 0.175 - 2\left( {0.0866} \right)\\&= {\text{ 0}}{\text{.0018 M}}\\\end{aligned}$

Learn more:

Calculate equilibrium constant for ammonia synthesis: Complete equation for the dissociation of (aq):

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Equilibrium

Keywords: chemical equilibrium, reactants, products, concentration, A, B, C, D, a, b, c, d, kc, equilibrium constant, 0.0018 M, NO, N2, O2.

Answer from: Quest

passed in september 1935, these laws are known as nuremberg laws. they forbid jews from marrying but not directly forced them to divorce aryans. what is most noticeable is the fact that the jews were defranchised, meaning by this that they were not expected to have any civil rights, including the right to vote. the right answer is deprived of the right to vote.

Answer from: Quest

Talc (french chalk) is the ingredient

Another question on Chemistry

Chemistry, 22.06.2019 04:20

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h

Answers: 1

Answer

Chemistry, 22.06.2019 09:30

Why do cells appear different in distilled water than they do in 10% salt water?

Answers: 2

Answer

Chemistry, 22.06.2019 14:50

Complete the following statements to describe solids, liquids, and gases. select the correct answer from each drop-down menu. a solid a definite volume and a definite shape. a liquid a definite volume and a definite shape. a gas a definite volume and a definite shape

Answers: 1

Answer

Chemistry, 22.06.2019 18:30

You open a can of soda at room temperature and hear a hiss. which of the following factors has changed inside the container? a.) atmospheric pressure b.) temperature of gas c.) type of gas d.) amount of gas

Answers: 1

Answer

You know the right answer?

At 2000 ∘c the equilibrium constant for the reaction 2no(g)⇌n2(g)+o2(g) is kc=2.4×103. you may want...

Questions