Use collision theory to explain why increasing temperature increases the rate of reaction.
From Chemistry 2, Higher
33 marks
Explain the difference between exothermic and endothermic reactions, with an example of each.
From Chemistry 2, Higher
72 marks
60 cm³ of gas was collected in 30 s. Calculate the mean rate of reaction.
From Chemistry 2, Higher
84 marks
Use the bond energies (kJ/mol) H–H 436, Cl–Cl 243, H–Cl 432 to calculate the energy change for H₂ + Cl₂ → 2HCl.
From Chemistry 2, Higher
122 marks
45 cm³ of gas was collected in 25 s. Calculate the mean rate of reaction.
From Chemistry 2, Higher
134 marks
Use the bond energies (kJ/mol) H–H 436, O=O 498, O–H 464 to calculate the energy change for 2H₂ + O₂ → 2H₂O.
From Chemistry 2, Higher
173 marks
Explain how a catalyst increases the rate of a reaction.
From Chemistry 2, Higher
183 marks
Sketch and describe a reaction profile for an exothermic reaction.
Score 0 / 25 · 0 of 8 marked
This paper is written by Plasmo in the style of the Edexcel GCSE Combined Science exam. It is not a past paper and is not produced or endorsed by the exam board.