Changes in Temperature & Pressure (AQA A-Level Chemistry): Flashcards

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Changes in Temperature & Pressure
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Effect of ↑ temp on exothermic reaction equilibrium

Shifts left (toward reactants), favours endothermic reverse

Effect of ↑ temp on KpK_p for exothermic reaction

Decreases KpK_p

Effect of ↑ temp on endothermic reaction equilibrium

Shifts right (toward products), favours forward reaction

Effect of ↑ temp on KpK_p for endothermic reaction

Increases KpK_p

Effect of ↑ pressure on gas equilibrium

Shifts to side with fewer gas molecules

Effect of ↓ pressure on gas equilibrium

Shifts to side with more gas molecules

Do pressure changes affect KpK_p?

No, only temperature affects KpK_p

Which factor can alter KpK_p value?

Temperature (only)

Effect of catalysts on equilibrium position

No effect on position or KpK_p value

Effect of catalysts on reaching equilibrium

Speed up rate; equilibrium reached faster

Explore AQA A-Level Chemistry Revision Notes by Topics

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Equilibrium constant (Kp) for Homogeneous Systems (A Level only)

Electrode Potentials & Electrochemical Cells (A Level only)

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Explore AQA A-Level Chemistry Quizzes by Topics

Thermodynamics (A Level only)

Rate Equations (A Level only)

Equilibrium constant (Kp) for Homogeneous Systems (A Level only)

Electrode Potentials & Electrochemical Cells (A Level only)

Fundamentals of Acids & Bases (A Level only)

Further Acids & Bases Calculations (A Level only)

Explore AQA A-Level Chemistry Exam Questions by Topics

Thermodynamics (A Level only)

Rate Equations (A Level only)

Equilibrium constant (Kp) for Homogeneous Systems (A Level only)

Electrode Potentials & Electrochemical Cells (A Level only)

Fundamentals of Acids & Bases (A Level only)

Further Acids & Bases Calculations (A Level only)

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