Chemistry > AQA > AQA_A Level Chemistry Paper 3_Question Paper 2022 | Practice paper 3 (All)

AQA_A Level Chemistry Paper 3_Question Paper 2022 | Practice paper 3

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AQA A Level Chemistry Paper 3 Question Paper 2022 Practice paper 3 - - - 1 A 5.00 g sample of potassium chloride was added to 50.0 g of water initially at 20.0 °C. The mixture was stirred and... as the potassium chloride dissolved, the temperature of the solution decreased. (a) Describe the steps you would take to determine an accurate minimum temperature that is not influenced by heat from the surroundings. _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ (4) A-LEVEL CHEMISTRY Name: Practice Paper 3 Maximum marks: 90 Time allowed: 2 hours These questions are from past papers covering topics and skills based on the advance information to help you prepare for the exams this summer. Answer all questions in the spaces provided. You will need the Periodic Table/Data Booklet This document is licensed to Haggerston School - MB260045Page 2 (b) The temperature of the water decreased to 14.6 °C. Calculate a value, in kJ mol−1, for the enthalpy of solution of potassium chloride. You should assume that only the 50.0 g of water changes in temperature and that the specific heat capacity of water is 4.18 J K−1 g−1. Give your answer to the appropriate number of significant figures. [Show More]

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