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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 is the best reason to use ?H in kJ mol-1 rather than kJ g-1 when reporting enthalpy change?
A student measures a temperature fall when dissolving ammonium nitrate in water. Which conclusion is correct?
Which practical step will most improve accuracy when measuring small temperature changes in reaction calorimetry?
In a simple calorimetry example, burning 2.00 g of fuel A releases 5000 J. What energy per gram does fuel A release?
When using bond energies, why are calculated ?H values sometimes different from experimental ?H values?
Which of the following best explains why increasing temperature usually increases reaction rate?
A reaction gives ?H = -125 kJ mol-1. Which statement is correct?
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)?
Which change will directly reduce the activation energy required for a reaction?
What is the activation energy of a reaction?
Which statement correctly defines an endothermic reaction?