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Initialtemp. Cuso / C Maximum Temp. / C Temp Increase/ C: MG + Cuso ZN+ Cuso Alcohol Property

1. The document describes an experiment to determine which alcohol (methanol, ethanol, propan-1-ol, or butan-1-ol) has the highest heat of combustion. 2. The experiment involves measuring the increase in temperature of water when each alcohol is burned and the heat is transferred to the water in a copper tin. 3. The alcohol with the highest number of carbon atoms per molecule is predicted to have the highest heat of combustion based on the hypothesis that more carbon means more energy released during combustion.

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67 views1 page

Initialtemp. Cuso / C Maximum Temp. / C Temp Increase/ C: MG + Cuso ZN+ Cuso Alcohol Property

1. The document describes an experiment to determine which alcohol (methanol, ethanol, propan-1-ol, or butan-1-ol) has the highest heat of combustion. 2. The experiment involves measuring the increase in temperature of water when each alcohol is burned and the heat is transferred to the water in a copper tin. 3. The alcohol with the highest number of carbon atoms per molecule is predicted to have the highest heat of combustion based on the hypothesis that more carbon means more energy released during combustion.

Uploaded by

baskie
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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1.

The value of Heat of displacement


between copper and magnesium is higher
than the Heat of displacement copper with
zinc. Design an experiment to prove the
above statement.
Problem Statement: The value of Heat of
displacement between copper and magnesium is
higher than the Heat of displacement copper with Procedure 1. 200 cm3 of water is measured using
zinc? a measuring cylinder and then is poured into a
Variables copper tin.
Manipulated: Type of metal which displace Copper 2. The copper tin is placed on the tripod stand as
Responding : Heat of displacement/Temperature shown in the diagram.
change 3.The initial Temperature of the water is recorded
Fixed : Volume and concentration of copper (II) in the table below.
sulphate 4 A lamp is filled with methanol.
Materials :Magnesium, Zinc, 1moldm-3copper (II) 5. The lamp together with the wick is weighed and
sulphate the weight is recorded in the table below.
Apparatus :250ml Beaker, Thermometer 0 6. A wind shield is placed to protect the apparatus
1000C , 50ml , Measuring cylinder from air flow/wind disturbances.
Procedure : 7. The lamp is immediately placed below the
1. 50cm3(or any other relevant volume) of 1 mol copper tin as shown in the diagram and the wick is
dm-3copper (II) sulphate solution is poured into a ignited.
polystyrene cup. 7. The water in the tin is stirred continuously with
2. The initial temp. of the copper (II) sulphate thermometer during heating until the temperature
solution is measured using a thermometer. of water increases by 300C.
3. 4g (or appropriate mass) of magnesium powder 8.The flame is extinguished and the maximum
which is in excess is poured into a polystyrene cup temperature of the water is recorded.
containing copper (II) sulphate solution. 9. The lamp is immediately and the weight is
4. The mixture in the polystyrene cup is stirred recorded in the table below.
using the thermometer. 10. Steps 1 to 9 is repeated using ethanol, propan-
5. The maximum temperature is recorded. 1-ol and butan-1-ol.
6. The Experiment is repeated by replacing 4g of
magnesium powder with 4g of zinc powder.
Eksp InitialTemp. Maximum Temp Tabulation of data:
CuSO4 /0C Temp. / increase/0 TABLE A
0C C Methano Ethanol propan-1-ol Butan-
Mg + CuSO4 Alcohol l 1-ol
Zn+ CuSO4 Property
Initial Mass
2. At the moment the price of petrol is Lamp +
alcohol/ g
increasing gradually. Studies have been
Final Mass
done to find substitutes for petrol as a fuel lamp +
You are given methanol, ethanol, propan- alcohol/ g
1-ol and butan-1-ol. You are required to Mass
design an experiment to find which is a alcohol / g
Initial
better fuel
Temperature
/0C
Problem Statement : Does the alcohol with a Increase in
higher number of carbon atoms per molecule Temperature
alcohol have a higher heat of combustion? /0C
Hypothesis: The higher the number of carbon Temperature
atoms per molecule alcohol the higher is the /0C
heat of combustion. Table B
Manipulated: Different Types of alcohol Alcohol No. of Carbon Heat of
Responding Heat of combustion atoms per Combustion
Fixed : Volume of water , copper tin. molecule alcohol kJ/Mol
Methanol
Apparatus : Copper tin ,Tripod stand, Retort
Ethanol
stand with clamp , Pipe-Clay triangle,
propan-1-ol
Thermometer 0 1000C, Measuring cylinder Butan-1-ol
100 cm3 , Wind Shield, wooden block and lamp.

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