Consider the following reactions when answering questions 46. Reaction 1: 2 NO(g

Question

Consider the following reactions when answering questions 46.
Reaction 1: 2 NO(g) + Br2(g) 2 NOBr(g) H°rxn = 16 kJ Kp = 27 at 25°C

Reaction 2: CCl4(g) C(s) + Cl2(g) H°rxn = +100 kJ Kp = 2.6x109 at 25°C

1. . For which reaction(s) above would an increase in reaction vessel volume (compression) at constant temperature result in an increase in product yield?

A) Reaction 1 only

B) Reaction 2 only

C) Both reactions

D) Neither reaction

2. . For which reaction(s) above would an increase in temperature at constant volume result in an increase in product yield?

A) Reaction 1 only

B) Reaction 2 only

C) Both reactions

D) Neither reaction

3. Consider the reaction COCl2(g) CO(g) + Cl2(g) which is at equilibrium when it contains the following pressures: 0.10 atm COCl2, 0.20 atm CO, 0.30 atm Cl2. The system is then compressed to half its original volume. What is the pressure of COCl2 when the system returns to equilibrium?

A) 0.08 atm

B) 0.12 atm
C) 0.20 atm
D) 0.28 atm
E) 0.32 atm

Please help with these. Thank you so much.

Explanation / Answer

1) answer : B) Reaction 2 only

increase in volume means decrease in pressure . if we decrease the pressure the reaction will shift where again volume increase side or number of moles increase side

reaction two only moles increases form 1 mole CCl4 to 2 moles Cl2

2) answer : B) Reaction 2 only

explanation:

forward reaction is for 2 is endothermic reaction.endothermic reaction favours at high temperature so 2 only favoured becuase its delta H is positive

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