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  • Help me please, - Physical and Chemical Equilibria - BITSAT-2

The equlibrium constant for  H_2 (g) + CO_2 (g) \leftrightarrow H_2O(g) + CO(g)  is 1.80 at  1000 *C .If 1 mole of H2 and 1 mole of Co2 are placed in one litre flask, the final equilibrium concentration of CO at 1000*C will be

  • Option 1)

    0.573 M

  • Option 2)

    0.385 M

  • Option 3)

    5.73 M

  • Option 4)

    0.295 M

 

Answers (1)

best_answer

As we learned in concept

Law of Chemical equilibrium -

At a given temperature, the product of concentration of the reaction products raised to the respective stoichiometric coefficient in the balanced chemical equation divided by the product of concentration of the reactants raised to their individual stoichiometric coefficients has a constant value.

- wherein

aA+bB\rightleftharpoons cC+dD


K_{c}=\frac{[C]^{c\:[D]^{d}}}{[A]^{a}\:[B]^{b}}

[A],\:[B],\:[C]\:[D]

are equilibrium concentration

 

                                 H_{2}(g)+CO_{2}(g)\rightleftharpoons H_{2}O(g)+CO(g), k =1.8

at t=0                              1                1                    0                    0       

at equilibrium                 1-x             1- x                 x                    x

=>1.8=\frac{x^{2}}{(1-x)^{2}}

\frac{x}{1-x}=1.34

x=0.573


Option 1)

0.573 M

Option is correct

Option 2)

0.385 M

Option is incorrect

Option 3)

5.73 M

Option is incorrect

Option 4)

0.295 M

Option is incorrect

Posted by

Aadil

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