1. Why a catalyst does not affect the position of equilibrium in a reversible reaction?

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2. What does this diagram represent?

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3. Gas particles move at a speed of several hundred metres per second at room temperature. Explain why gases take several minutes to diffuse across a room

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4. What is meant by the term activation energy?

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5. What does this symbol represent?

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6. What will happen to the rate of reaction when we increase pressure ? A (g) + B (g) ⇋ C (g) (-∆H)

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7. Explain the effects of increasing the surface area of a solid on the rate of a reaction in terms of particle collision theory

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8. One feature of dynamic equilibrium is that there is no overall change in concentrations. What is the other?

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9. Explain why experimental values of enthalpy change differ from theoretical values

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10. Describe the chemical test for water

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11. What is meant by the term exothermic?

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12. What type of substance speeds up a chemical reaction but is chemically unchanged at the end of the reaction?

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13. Write a chemical equation for the reaction between hydrogen chloride and ammonia

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14. In the thermal decomposition of calcium carbonate, we might expect 50g of calcium carbonate to produce 28g of calcium oxide. If instead only 24g of calcium oxide is produced, what is the percentage yield?

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15. In a sealed container, a reversible reaction can reach a state of ______________________________

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