WorksheetsTHERMOCHEMISTRY
Total questions: 13
Worksheet time: 6mins
1.Name the precipitate formed from the experiment to determine the heat of precipitation
Silver nitrate
Silver chloride
Sodium nitrate
Sodium chloride
State the type of reaction that involved in the experiment heat of precipitation.
endothermic
exothermic
Why polystyrene cups is used in the activity to determine the heat of precipitation?
good conductor of heat , so it can reduce heat loss to the surrounding
poor conductor of heat , so it can reduce the heat loss to the surrounding
State one observation in the experiment of heat of precipitation from the video.
White precipitate is formed
Yellow precipitate is formed
White solution is formed
Yellow solution is formed
What is the meaning of heat of neutralisation?
The heat absorbed when acid reacts with an alkali
The heat change when one mole of water is formed from the reaction between acid and alkali
The heat change when one mole of salt is formed from the reaction between acid and alkali
State the responding variable for the experiment to determine the heat of neutralisation between acids and alkalis of different strengths.
types of acids used
heat of neutralisation
volume of sodium hydroxide solution
concentration of sodium hydroxide soluton
Which of the following apparatus are used in the experiment to determine the heat of neutralization?
polystyrene cups with lids
themometer
beaker
measuring cylinder
copper can
Which of the following is a weak acid?
Hydrochloric acid
Nitric acid
Ethanoic acid
Sulphuric acid
The theoretical value of the heat of neutralisation between strong acid and strong alkali is -57kJ/mol.
CORRECT
FALSE
Choose the correct problem statement of experiment to determine the heat of combustion of various alcohols.
Does the number of carbon atoms per molecule in alcohol affect the heat of combustion?
Does the number of hydrogen atoms per molecule in alcohol affect the heat of combustion?
Does the number of oxygen atoms per molecule in alcohol affect the heat of combustion?
State the product formed from the complete combustion of ethanol.
carbon
carbon dioxide and oxygen gas
carbon dioxide and water
carbon monoxide and water
The heat of combustion obtained form the experiment is normally less than the theoretical value. Which precaution can be taken to increase the accuracy of the result?
Light the wick before placing the lamp under the container
Stir the water continuously throughout the experiment
Heat the water in the glass beaker
Weigh the lamp when it is cold
In order to determine the heat of combustion, why is a copper can is used in this experiment?
good conductor of heat
poor conductor of heat
