1. What does this symbol represent?

Question 1 of 15

2. What is meant by the term endothermic?

Question 2 of 15

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

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

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5. What does the symbol ΔH mean

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6. State the expression for calculating % yield.

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7. 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

Question 7 of 15

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

Question 8 of 15

9. Explain the effects of increasing the temperature on the rate of a reaction in terms of particle collision theory

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

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11. What happens if two particles collide with less than the activation energy

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12. What colour is anhydrous copper (II) sulfate?

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

Question 13 of 15

14. One feature of dynamic equilibrium is that the rate of the forward reaction is equal to the rate of the backward reaction. What is the other feature?

Question 14 of 15

15. What will happen to the equilibrium position when we decrease pressure? Give a reason for your prediction. 2A (s) + B (g) ⇋ C (g) + D (g) (+∆H)

Question 15 of 15