AQA · Chemistry · 8462

GCSE Chemistry: The effect of pressure changes on equilibrium

The rate and extent of chemical change · AQA GCSE Chemistry (8462), specification point 4.6.2.7. Cards are generated from the exam board's own specification for "The effect of pressure changes on equilibrium", and every card links back to the page it came from. Higher tier only. Specification © AQA — used with attribution.

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In a gaseous equilibrium, which way does the position shift when pressure increases?
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Towards the side with the smaller number of gas molecules (as shown by the symbol equation).
In a gaseous equilibrium, which way does the position shift when pressure decreases?
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Towards the side with the larger number of gas molecules (as shown by the symbol equation).
Increasing the pressure on a gaseous equilibrium shifts the position towards the side with the ? number of molecules.
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smaller
What determines the number of molecules on each side of a gaseous equilibrium?
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The balanced symbol equation for the reaction — count the moles of gas on each side.
To which type of reaction does the pressure–equilibrium rule apply?
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Gaseous reactions at equilibrium (reversible reactions involving gases).
Why can carbon form such a great variety of compounds?
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Carbon atoms can form chains and rings linked by C–C bonds.
Why is the chemistry of carbon compounds called 'organic' chemistry?
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Because the main sources of organic compounds are living or once-living materials from plants and animals.
Organic chemistry is the branch of chemistry that studies ? compounds.
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carbon
Which type of source is a major feedstock for the petrochemical industry?
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Fossil fuels.
Name two useful materials chemists make by modifying organic molecules.
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Any two of: polymers, pharmaceuticals, perfumes, flavourings, dyes, detergents.

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All questions and answers

In a gaseous equilibrium, which way does the position shift when pressure increases?

In a gaseous equilibrium, which way does the position shift when pressure decreases?

Increasing the pressure on a gaseous equilibrium shifts the position towards the side with the ? number of molecules.

What determines the number of molecules on each side of a gaseous equilibrium?

To which type of reaction does the pressure–equilibrium rule apply?

Why can carbon form such a great variety of compounds?

Why is the chemistry of carbon compounds called 'organic' chemistry?

Organic chemistry is the branch of chemistry that studies ? compounds.

Which type of source is a major feedstock for the petrochemical industry?

Name two useful materials chemists make by modifying organic molecules.