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Tutor HuntTest QuestionsChemistry QuestionsYear 10 Chemistry Questions

 

The Energy Change Of Reactions (ht Only) (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'The Energy Change Of Reactions (ht Only)' from the broader topic Energy Changes. The test is geared towards the AQA exam board style syllabus.
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Below a typical questions that will be covered in this test. You final score will be logged on your account

Which unit is most appropriate for standard enthalpy changes reported in data tables?
Which statement correctly defines an exothermic reaction?
When using bond energies, why are calculated ?H values sometimes different from experimental ?H values?
In a theoretical Hess’s law question you are given two reactions to add to make a target reaction. What operation is usually required when reversing one of the given equations?
Which change will directly reduce the activation energy required for a reaction?
Which of the following changes will increase the temperature change measured in a dissolving experiment (greater |?T|)?
A reaction gives ?H = -125 kJ mol-1. Which statement is correct?
When an acid neutralises an alkali in solution, which is true about the energy change?
Which statement about Hess’s law is correct?
Which practical step will most improve accuracy when measuring small temperature changes in reaction calorimetry?
In bond-energy calculations for the reaction H2 + Cl2 ? 2HCl, if H—H = 436 kJ mol-1, Cl—Cl = 346 kJ mol-1 and H—Cl = 432 kJ mol-1, what is ?H (in kJ mol-1)?