Question

Consider the following reaction where Kp = 1.57 at 600 K: CO(g) + Cl2(g) COCl2(g) If the three gases are mixed in a rigid container at 600 K so that the partial pressure of each gas is initially one atm, what will happen?

Indicate True (T) or False (F) for each of the following:

1. A reaction will occur in which COCl2(g) is produced

2. Kp will decrease.

3. A reaction will occur in which CO is produced.

4. Q is less than K

. 5. The reaction is at equilibrium. No further reaction will occur.

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2.
Consider the following reaction where Kp = 2.74 at 1150 K.  

2SO3(g) 2SO2(g) + O2(g)  

If the three gases are mixed in a rigid container at 1150 K so that the partial pressure of each gas is initially one atm, what will happen?

Indicate True (T) or False (F) for each of the following:

___
T
F
1. A reaction will occur in which SO3(g) is produced.
___
T
F
2. Kp will increase.
___
T
F
3. A reaction will occur in which SO2 is consumed.
___
T
F
4. Qp is greater than Kp.
___
T
F
5. The reaction is at equilibrium. No further reaction will occur.

Answer 1

To answer questions we need to calculate Q value for both reactions.

Given reaction is , CO _(g) + Cl _{2 (g)} COCl _{2 (g)}

The K p value of reaction is K p = ( P COCl ₂) / ( P CO ) x ( P Cl ₂ ) = 1.57

Q value of reaction = ( P COCl ₂) / ( P CO ) x ( P Cl ₂ ) = 1 / 1 x 1 = 1

Q < K p , reaction will proceed in forward direction.

1) Reaction will occur in which COCl ₂ is produced.

ANSWER : TRUE

Q < K p so reaction will proceed in forward direction to produce COCl ₂ .

2 ) K p will decrease.

ANSWER : FALSE

Reaction is carried out at constant temperature. We know that , K p value only depends on temperature. In this case , temperature is constant so there will be no change in K p.

3) Reaction will occur in which COis produced.

ANSWER : FALSE

Q < K p so reaction will proceed in forward direction to produce COCl ₂ not CO. To produce CO reaction will proceed in backward direction which is not possible in this case.

4) Q is less than K

ANSWER : TRUE

Q = 1 and K = 1.57

5) Reaction is at equilibrium no further reaction will occur.

ANSWER: FALSE

At equilibrium , Q= K. Here equilibrium is not reached so reaction will proceed in forward direction to maintain equilibrium

Given reaction is ,2 SO_3(g) 2 SO _{2 (g)} + O _{2 (g)}

The K p value of reaction is K p = ( P SO ₂) ² x ( P O ₂ ) /  ( P SO₃ ) ² = 2.74

Q value of reaction = ( P SO ₂) ² x ( P O ₂ ) /  ( P SO₃ ) ²= 1 x 1 /  1 = 1

Q < K p , reaction will proceed in forward direction.

1) Reaction will occur in which SO_3(g)is produced.

ANSWER : FALSE

Q < K p so reaction will proceed in forward direction to produce SO ₂ and .O ₂

2 ) K p will increase.

ANSWER : FALSE

Reaction is carried out at constant temperature. We know that , K p value only depends on temperature. In this case , temperature is constant so there will be no change in K p.

3) Reaction will occur in which SO ₂is consumed.

ANSWER : FALSE

Q < K p so reaction will proceed in forward direction to produce SO ₂  . To consume SO ₂ reaction will proceed in backward direction which is not possible in this case.

4) Q is greater  than K

ANSWER : False

Q = 1 and K = 2.74

5) Reaction is at equilibrium no further reaction will occur.

ANSWER: FALSE

At equilibrium , Q= K. Here equilibrium is not reached so reaction will proceed in forward direction to maintain equilibrium