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EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復(fù)習(xí)筆記：3.1.4 Practical: Investigating Temperature Changes

Category: IGCSE課程, 國際課程, 教材筆記, 福利干貨 Date: 2022年11月15日下午3:42

EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復(fù)習(xí)筆記：3.1.4 Practical: Investigating Temperature Changes

Practical: Investigating Temperature Changes

Aim:

To perform a calorimetry study of the reaction between HCl and NaOH

Materials:

Dilute hydrochloric acid
Dilute sodium hydroxide solution
Styrofoam (polystyrene) calorimeter & lid
25 cm³?measuring cylinder
Thermometer & stirrer

Calorimeter - Styrofoam Cup, IGCSE & GCSE Chemistry revision notes

Diagram showing the apparatus for the calorimetry investigation for displacement, dissolving and neutralisation

Method:

Using a measuring cylinder, place 25 cm³?of the NaOH solution into the calorimeter
Measure and record the temperature of the solution
Add 5 cm³?of the dilute HCl and stir
Measure and record the highest temperature reached by the mixture
Repeat steps 1 – 4 increasing the amount of acid added by 5 cm³?each time

Results:Record your results in a suitable table, eg:

Investigating Temperature Changes Table, downloadable IGCSE & GCSE Chemistry revision notes

Evaluation:

Plot a graph of the results and draw a line of best fit, using the graph to determine what volume of acid causes the biggest change in temperatureConclusion:The larger the difference in the temperature the more energy is absorbed or released

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