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WorksheetsThermochemistry SCIENCE
Total questions: 20
Worksheet time: 16mins
Which of the following involves an exothermic reaction?
boiling of water
photosynthesis
dissolving salt in water
burning of paper
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
Diagram shows ammonium chloride crystals dropped into water.
What is the possible temperature of the solution formed when ammonium chloride powder is dissolved in water at room temperature?
Note : room temperature in the range of 23−26 °C
A. 0 °C
B. 20 °C
C. 30 °C
D. 40 °C
Which of the following chemical reaction is not exothermic reaction?
respiration
bomb explosion
rusting of iron
photosynthesis
Diagram shows sodium hydroxide powder is dissolved in water at room temperature.
What is the possible temperature?
Remark : room temperature at Malaysia in the range of 26−30 °C
A. 0°C
B. 20 °C
C. 30 °C
D. 40 °C
E. 100 °C
Photosynthesis is an (a) reaction.
Bomb explosion is an (a) reaction.
Evaporation of water is an (a) reaction.
cooking rice is an (a) reaction.
Using of iron nail is an (a) reaction.
Bake a cake in microwave oven is an (a) reaction.
Diagram shows the cellular respiration occurred at mitochondrion. Respiration is an (a) reaction.
Melting of ice is an example of (a) reaction.
Boiling of water is an (a) reaction.
Freezing (pembekuan) is an example of (a) reaction.
Drying of clothes is an example of (a) reaction.
Fry an egg is an example of (a) reaction.
Which of the following is incorrect regarding the sodium hydroxide reacts with water at the end of the reaction?
A. The reaction is an exothermic reaction
B. This reaction releases heat into the surroundings
C. The total energy content of the product is more than that of the reactants.
D. Temperature reading increases & the container becomes hot
Diagram shows solid potassium nitrate added into the water.
Which of the following statement is correct at the end of the reaction?
A. It is exothermic reaction
B. Final temperature < initial temperature
C. container becomes hot
D. the total energy content of the product is less than that of the reactants
Fill in the blank about exothermic reaction.
(a)
