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WorksheetsF3 SCIENCE CHAPTER 5 THERMOCHEMISTRY
Total questions: 32
Worksheet time: 16mins
What is the measuring device that is suitable to identify endothermic and exothermic reactions?
Apakah alat pengukur yang sesuai untuk mengenal pasti tindak balas endotermik dan eksotermik?
An athlete puts a cold pack on an inflamed joint, due to sprained leg. Which of the following chemicals (bahan kimia) is found in the cold pack (pek sejuk)?
A. calcium chloride
B. SODIUM CHLORIDE
C. potassium oxide
D. Ammonium nitrate
How is heat transferred?
From warm to cold
From top to bottom
From cool to warm
Flows around
Which one of the following is correct about the reaction shown in the diagram?
Manakah yang berikut benar tentang tindak balas yang ditunjukkan dalam rajah?
Heat energy absorbed is used to break chemical bonds
Tenaga haba yang diserap digunakan untuk memutuskan ikatan kimia
The chemical energy of the reactants is changed into heat energy
Tenaga kimia bahan tindak balas ditukarkan kepada tenaga haba
Temperature of surroundings increases.
Suhu persekitaran meningkat.
Energy change: Chemical energy --> Heat energy
Perubahan tenaga: Tenaga kimia --> Tenaga haba
Which one of the following is not an example of exothermic reaction?
Manakah yang berikut bukan merupakan contoh tindak balas eksotermik?
Fuel is needed to move a car. What chemical reaction involved when the car is moving?
Exothermic
Endothermic
Exothermic and endothermic
Which is an endothermic reaction?
which of the following is an endothermic process?
solid to gas
solid to liquid
liquid to solid
gas to liquid
Mark the exothermic reaction
Choose the tools that apply the concept of thermochemistry reactions.
What is the use of hot pack?
Treating swelling
Cure fever
Relieve joint pain
Relieve inflammation
How can we identify that the absorption of heat has occurred?
The surrounding temperature increases
The surrounding temperature decreases
The container will heat up
No change occurs
The diagram shows the set - up of apparatus for an experiment.
Which of the following statements is true about the reaction that occurred in the experiment?
Temperature of water increases
Heat energy is absorbed from the environment
Exothermic reaction occurs
Heat energy is released during reaction
Breaking the chemical bond releases energy.
TRUE
FALSE
The diagram shows sublimation process that occurs in dry ice.
This process is endothermic. Why?
New substance is formed
There is a conversion of energy
Dry ice absorbs heat from surroundings
The water vapour formed is very cold.
The diagram shows the bread dough is put into an oven to be baked.
Which statements are correct about the baking process?
Choose more than one answer.
Endothermic reaction occurs
The heat from the oven is absorbed by the dough
Thermal equilibrium achieved when the bread is cooked
The formation of new substance did not occur
Which process does not involve the release of heat energy?
The combustion of petrol
The formation of ice
Volcano eruption
Melting of butter
Respiration is an exothermic reaction.
Which of the following explains about the process?
Release heat to the environment
The chemical bond in glucose is broken down
Heat energy is changed to chemical energy
Forming water as byproduct
When sodium hydroxide is added to hydrochloric acid, the temperature reading on the thermometer is ______________ and the reaction name is __________________
decreasing
increasing
constant
neutralisation
titration
Respiration, bomb explosion and neutralisation of acid with alkali are the examples of _______________ reactions
exothermic
endothermic
precipitation
Dissolving ammonium salt in water will cause a ___________ in surrounding temperature
increase
higher
drop
constant
Cake baking is
endothermic
exothermic
Endothermic reaction is when the heat is _________________ from the surrounding
taken in
released
taken out
Exothermic reaction is where heat is __________ to the surrounding
taken in
absord
released
Thermochemistry is
the study of heat changes when physical reactions occur.
the study of heat changes when chemical reactions occur.
the study of energy changes when physical reactions occur.
The following explains a situation. Which of the following situations are true about the situation?
I. Samad's body releases heat when he took a hot shower
II. Samad's body absorbs heat when he took a hot shower
III. Samad's body releases heat to the surrounding when he walked out of the bathroom
IV. Samad's body absorbs heat from surrounding when he walked out of the bathroom
I and II
III and IV
II and III
I and IV
Which of the following devices are used to measure body temperature?
I. Opisometer
II. Spirometer
III. Thermometer
IV. Digital infrared scanner
I and II
III and IV
II and III
I and IV
Diagram 1 shows Patrick put a pack on his head because of fever. Which of the following statements is true?
Patrick uses a cold pack to absorb heat from his forehead
Patrick uses a cold pack to release heat from his forehead
Patrick uses a hot pack to absorb heat from his forehead
Patrick uses a hot pack to release heat from his forehead
Which of the following situations is an endothermic reaction?
Sitting by the campfire
Touching an ice with hand
Explosion of fireworks
Drying under the sun
The following chemical equation shows a process carried out by green plants. Which of the following statements is true?
Photosynthesis is an endothermic process
Photosynthesis is an exothermic process
Respiration is an endothermic process
Respiration is an exothermic process
What is thermochemistry?
The study of generation of heat energy by burning fuel
The study of chemical reaction between metals and non-metals
The study of chemical substances releasing heat to the surrounding
The study of heat change during a chemical reaction
What is Endothermic Reaction?
Is the reaction that absorb heat
Is the reaction that release heat
Is the reaction that decrease the surrounding temperature.
Is the reaction that increase the surrounding temperature
