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Medical
9 months, 3 weeks ago

Need clarity, kindly explain! - Equilibrium - NEET-2

In which  of the following equilibrium $K_{c}$ and $K_{p}$ are not equal?

• Option 1)

$2NO_{\left ( g \right )}\rightleftharpoons N_{2\left ( g \right )}+O_{2\left ( g \right )}$

• Option 2)

$SO_{2\left ( g \right )}+NO_{2\left ( G \right )}\rightleftharpoons SO_{3\left ( g \right )}+NO_{\left ( g \right )}$

• Option 3)

$H_{2\left ( g \right )}+I_{2\left ( g \right )}\rightleftharpoons 2HI_{\left ( g \right )}$

• Option 4)

$2C_{\left ( s \right )}+O_{2\left ( g \right )}\rightleftharpoons 2CO_{2\left ( g \right )}$

Answers (1)
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A aadil.khan
Answered 9 months, 2 weeks ago

As we discussed in concept

Relation between Kp and Kc -

$K_{p}=K_{c}(RT)^{\bigtriangleup n}$

while calculating the value of Kp , pressure should be expressed in bar.

$1\:bar=10^{5}pa$

- wherein

$\bigtriangleup n$ = (number of moles of gaseous products) - (number of moles gaseous reaction)

$K_{p}=K_{c}.(RT)^{\Delta n}$

In 1), 2) and 3) $\Delta n=0, \:\:\:i.e\:\:\:\:K_{p}=K_{c}$

In 4) $\Delta n=2-1=1$

$\therefore K_{p}\neq K_{c}$

Option 1)

$2NO_{\left ( g \right )}\rightleftharpoons N_{2\left ( g \right )}+O_{2\left ( g \right )}$

This option is incorrect.

Option 2)

$SO_{2\left ( g \right )}+NO_{2\left ( G \right )}\rightleftharpoons SO_{3\left ( g \right )}+NO_{\left ( g \right )}$

This option is incorrect.

Option 3)

$H_{2\left ( g \right )}+I_{2\left ( g \right )}\rightleftharpoons 2HI_{\left ( g \right )}$

This option is incorrect.

Option 4)

$2C_{\left ( s \right )}+O_{2\left ( g \right )}\rightleftharpoons 2CO_{2\left ( g \right )}$

This option is correct.

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