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Measurement of Volume

Equilibrium p...

Question

Equilibrium position of which of the following reactions is not affected by change in pressure?

A

I_{2 (s)} + 5 F_{2 (g)} \to 2 I F_{5_{(} g)}

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B

F e O_{(s)} + C O_{(g)} \to F e_{(s)} + C O_{(g)}

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C

2 C u (N O_{3})_{2_{(} s)} \to 2 C u O_{(s)} + 4 N O_{2_{(} g)} + O_{2_{(} g)}

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D

N O_{2} O_{4_{(} g)} \to 2 N O_{2_{(} g)}

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Solution

The correct option is B $F e O_{(s)} + C O_{(g)} \to F e_{(s)} + C O_{(g)}$
Change in pressure affects the equilibrium position of the reaction only when there is a change in the number of molecules or moles.
In the reaction given in (B), there is no change in number of molecules, (no. of molecules of reactants = no. of molecules of products = 2) , therefore change in pressure doesnot affect the equilibrium position.
In all other reactions, there is a change in the number of molecules and hence, change in pressure affects the equilibrium position of the reaction.

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Similar questions

Q. Write the expression for the equlibrium constant,

K_{c}

for each of the following reactions.
(i)

2 N O C l (g) \to 2 N O (g) + C l_{2} (g)

2 C u (N O_{3})_{2} (s) \to 2 C u O (s) + 4 N O_{2} (g) + O_{2} (g)

C H_{3} C O O C_{2} H_{5} (a q) + H_{2} O (l) \to C H_{3} C O O H (a q) + C_{2} H_{5} O H (a q)

F e^{3 +} (a q) + 3 O H^{-} (a q) \to F e (O H)_{3} (s)

I_{2 (s)} + 5 F_{2} (g) \to 2 I F_{5} (g)

Q. The expression for equilibrium constant,

K_{c}

for the following reaction is :

2 C u (N O_{3})_{2 (s)} ⇌ 2 C u O_{(} s) + 4 N O_{2 (g)} + O_{2 (g)}

Q. Consider the reaction :

2 C u {({N O}_{3})}_{2 (s)} \to 2 C u O_{(s)} + 4 {N O}_{2 (g)} + O_{2 (g)}

, which of the following gives the value of

K_{c}

of this equilibrium?

Q. Write the expression for the equilibrium constant,

K_{c}

for each of the following reactions.
(i)

2 N O C l (g) ⇌ 2 N O (g) + {C l}_{2} (g)

{2 C u ({N O}_{3})}_{2} (s) ⇌ 2 C u O (s) + 4 {N O}_{2} (g) + O_{2} (g)

{C H}_{3} {C O O C}_{2} H_{5} (a q) + H_{2} O (1) ⇌ {C H}_{3} C O O H (a q) + C_{2} H_{5} O H (a q)

{F e}^{3 +} (a q) + 3 {O H}^{-} (a q) ⇌ {F e (O H)}_{3} (s)

I_{2} (s) + 5 F_{2} ⇌ 2 I F_{5}

Q. From the following data at 25C, Calculate the standard enthalpy of formation of FeO(s) and of

{F e}_{2} O_{3} (s)

.

	Reaction	$Δ_{r} H (K J / m o l e)$
(1)	${F e}_{2} O_{3} (s) + 3 C (g r a p h i t e) \to 2 F e (s) + C O (g)$	492
(2)	$F e O (s) + C (g r a p h i t e) \to F e (s) + C O (g)$	155
(3)	$C (g r a p h i t e) + O_{2} (g) \to C O_{2} (g)$	-393
(4)	$C O (g) + 1 / 2 O_{2} (g) \to C O_{2} (g)$	-282

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