Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Physical Chemistry
442 practice questions
Topics covered
Practice questions
341–350 of 442
Question 341
2 marks · Easy
Answer and see the solution →For the following equilibrium reaction, calculate the difference in the total number of gaseous molecules between the left and right sides.
Question 342
2 marks · Easy
Answer and see the solution →Consider the following equilibrium:
Explain, with a reason, what would happen to the position of equilibrium if the pressure is decreased.
Question 343
3 marks · Easy
Answer and see the solution →For the following equilibrium:
A chemist measured the percentage of E(g), F(g), and G(g) at equilibrium under different pressure conditions. Use the data to answer the questions.
Condition % E(g) % F(g) % G(g) Low pressure 30 30 40 High pressure 25 25 50 (a)[1 mark]State the number of gaseous molecules on each side of the equation.
(b)[1 mark]Describe the effect of increasing the pressure on the position of equilibrium, using the data.
(c)[1 mark]Explain your answer to part (b).
Question 344
1 mark · Easy
Answer and see the solution →The following reaction is at equilibrium in a container:
If the pressure is increased, which direction will the equilibrium shift?
Question 345
3 marks · Easy
Answer and see the solution →Consider the following equilibrium, which is carried out in a sealed container:
(a)[1 mark]State the number of gas molecules on the left and the right side of the equation.
(b)[1 mark]State what will happen to the equilibrium position if the pressure is increased.
(c)[1 mark]Give a reason for your answer to part (b).
Question 346
2 marks · Easy
Answer and see the solution →The following reaction is at equilibrium at 400 K:
If the total pressure is doubled, predict the effect on the amount of A(g) formed at equilibrium. Show your reasoning.
(a)[1 mark]Calculate the number of gaseous molecules on each side of the equation.
(b)[1 mark]State whether the amount of A(g) at equilibrium will increase, decrease, or stay the same. Explain your answer.
Question 347
2 marks · Normal
Answer and see the solution →State why changing the pressure affects only equilibria involving gases, and only when the numbers of gaseous molecules on each side of the equation are different.
Question 348
4 marks · Normal
Answer and see the solution →The following reaction takes place in a closed container:
(a)[1 mark]State the total number of moles of gas on each side of this equation.
(b)[3 marks]The pressure of the system is increased. Predict and explain the direction in which the equilibrium will shift.
Question 349
3 marks · Normal
Answer and see the solution →The reaction below is allowed to reach equilibrium in a sealed container:
Explain, using the number of moles of gas, what will happen to the position of equilibrium if the pressure is decreased.
Question 350
4 marks · Normal
Answer and see the solution →Consider the following data collected for this equilibrium reaction:
Condition % M(g) % N(g) % Q(g) Low pressure 40 40 20 High pressure 45 45 10 (a)[1 mark]What is the total number of moles of gas on each side of the equation?
(b)[2 marks]Describe the effect that increasing pressure has on the amounts of M(g), N(g), and Q(g).
(c)[1 mark]Explain your answer to (b) in terms of the number of gas molecules.