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Law of Mass Action

Consider the ...

Question

Consider the reaction equilibrium: $2 S O_{2} + O_{2} ⇌ 2 S O_{3}$ : $Δ H^{0}$ = -195 kJ on the basis of Le Chateliers principle, the condition favourable for the forward reaction is?

A

Increasing temperature as well as pressure

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B

Lowering the temperature and increasing the pressure

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C

Any value of temperature and pressure

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D

Lowering of temperature as well as pressure

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Solution

The correct option is B Lowering the temperature and increasing the pressure
$\begin{matrix} 2 S O_{2} + O_{2} ⇌ 2 {S O}_{3} Δ H^{\circ} = - 195 K J It is exothermic reaction so lowering temperature favours forward reaction according to lechatliers principle \end{matrix}$
$\begin{matrix} Δ n = 2 - (2 + 1) = - 1 no. of moles decreases then increase in Pressure favours forward reaction. so (B) is correct \end{matrix}$

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Similar questions

Q. Consider the reaction :

2 S O_{2} (g) + O_{2} (g) ⇌ 2 S O_{3} (g); △ H^{o} = - 198 k J

The favourable conditions for the forward reaction are:

Q. The variation of K and

K_{f}

K_{b}

with temperature shows the following effects:
(i) For endothermic reaction K increases and

K_{f}

K_{b}

also increases with temperature.
(ii) For endothermic reaction K decreases and

K_{f}

K_{b}

also decreases with temperature.
(iii) For exothermic reaction K decreases and

K_{f}

K_{b}

both increases with temperature.
(iv) For exothermic reaction K increases and

K_{f}

K_{b}

decreases with temperature.
(v) For exothermic reaction K decreases and

K_{f}

K_{b}

both decreases with temperature.

Q. Statement I: When the temperature of a reaction at equilibrium is increased, the equilibrium will shift to favor the endothermic direction
Because
Statement II: Endothermic reactions involve heat acting as a reactant and Le Chateliers principle states that an equilibrium shift will occur to offset temperature changes

In the following reversible reaction $2 S O_{2} + O_{2} ⇌ 2 S O_{3} + Q C a l$

Most suitable condition for the higher production of $S O_{3}$ is

In the following reversible reaction $2 S O_{2} + O_{2} ⇌ 2 S O_{3} + Q C a l$

Most suitable condition for the higher production of $S O_{3}$ is

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