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Question 4

The reversible reaction of carbon monoxide and hydrogen to form methanol is shown below.

CO(g)+2H2(g)⇌CH3OH(g) \text{CO(g)} + 2\text{H}_2\text{(g)} \rightleftharpoons \text{CH}_3\text{OH(g)} CO(g)+2H2​(g)⇌CH3​OH(g)

In the equilibrium mixture, the partial pressure of CO\text{CO}CO is 6.0 atm6.0\text{ atm}6.0 atm and the partial pressure of H2\text{H}_2H2​ is 2.0 atm2.0\text{ atm}2.0 atm. The total pressure is 11.0 atm11.0\text{ atm}11.0 atm.

What is the value of KpK_{\text{p}}Kp​, in atm−2\text{atm}^{-2}atm−2?

A

0.06250.06250.0625

B

0.1250.1250.125

C

0.2500.2500.250

D

8.008.008.00

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  1. A Level
  2. /Chemistry
  3. /How far?

16 exam-style questions on OCR A A Level Chemistry How far?. Each one has a worked solution and a mark scheme showing where the marks go.

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