Home Based Experiment 2 - Ahmad Ghazi F2T02A

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Published on March 17, 2022 5:20:42 PM ● Video Link: https://www.youtube.com/watch?v=-07t9PQ-ZV4

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EXPERIMENT 2: DETERMINING THE HEAT OF REACTION

OBJECTIVE : (i) determine the heat capacity of a calorimeter.

(ii) determine the heat of reaction between an Acid and a Base.

INTRODUCTION: REFER TO LAB MANUAL
APPARATUS:
 Tumbler or paper Cup or plastic Cup or polystyrene cup with lid as ‘Calorimeter’
 20-mL Syringe or 20-mL measuring cup
 2 Cups with labels A and B
 Kitchen thermometer
 Teaspoon
CHEMICAL REAGENT:
 Vinegar or Lime juice or Lemon juice as the ACID
 Lime water, Ca(OH)2, or Sodium bicarbonate (baking soda) as BASE
 Hot water (50 - 60°C)
INSTRUCTION:
All procedures carried out must be recorded in the form of video or photos as evidence of
your work and submitted together with your report.
PROCEDURE
PART A: Determination of the heat capacity of a calorimeter
1. Construct your own calorimeter using either tumbler, paper, plastic, or polystyrene
cup as shown in Figure 1.

FIGURE 1
2. Measure the temperature, T1, of an empty calorimeter
3. Pour 40 mL of hot water (50 - 60°C) into the calorimeter. Close the lid immediately
and measure the initial temperature of the hot water, T2.
4. Observe the decrease in temperature until the temperature remains constant for 30
second. Record the temperature as T3.
5. Determine the heat capacity of the calorimeter.
Remarks: Empty the calorimeter and cool it down to room temperature. Then, proceed
to part B using the same calorimeter.

thermometer

CHEMISTRY 2 SK025 KMPP
________________________________________________________________________________________________________________
PART B: Determination of the heat of reaction between acid and base
1. Dissolve 1 teaspoon of limestone paste (or sodium bicarbonate) into Cup A that is
half-filled with water and stir until a homogenous solution is obtained. Assume the
molarity of the base solution prepared is 0.1 M
2. Using a syringe, measure 20 ml of the above solution into the calorimeter (from
Part A) and record the initial temperature of the solution.
3. Then, measure 20 mL of vinegar/lime or lemon juice using a 20 mL syringe and
transfer it into Cup B and thus, record the initial temperature of the solution. Assume
the molarity of the acid solution prepared is 0.1 M
4. Pour the solution in Cup B into the calorimeter containing lime water (or sodium
bicarbonate solution) and quickly cover the calorimeter with the lid.
5. Shake the calorimeter gently and record the maximum temperature reached.
6. Calculate the heat of the reaction.