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Reaction Profiles (GCSE Chemistry)
The following is a GCSE Chemistry test covering 'Reaction Profiles' from the broader topic Energy Changes. The test is geared towards the AQA exam board style syllabus.Incorrect: 0
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Question 1
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Which feature of a reaction profile is directly reduced by adding a catalyst?
Which of the following is true when a catalyst is used in a reaction?
A reaction profile for a catalysed reaction compared with the uncatalysed one will show
How does a catalyst change a typical reaction profile?
When bond energies are: C—H = X, C—C = 347, O=O = 498, C=O = 805, O—H = 464, and the overall reaction energy is -2219 kJ per mole (exothermic), which algebraic procedure finds X?
If the activation energy of a reaction is 200 kJ mol-1 and a catalyst reduces it to 120 kJ mol-1, the catalyst has
In bond-energy terms, why do exothermic reactions release energy?
If a reaction profile shows the products at a lower energy level than the reactants, this indicates the reaction is
Which of the following statements about the peak(s) on a reaction profile is correct?
Which description of a reversible reaction at dynamic equilibrium is correct?
Which effect does increasing temperature have on a reaction, as shown on a reaction-coordinate level concept?
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