FORM 3 CHAPTER 5: THERMOCHEMISTRY

The heat energy absorbed into the system is MORE than the heat energy released to the surroundings. What type of reaction is this?

• ENDOTHERMIC

• EXOTHERMIC

The heat energy absorbed into the system is LESS than the heat energy released to the surroundings. What type of reaction is this?

• ENDOTHERMIC

• EXOTHERMIC

Tick TWO examples of ENDOTHERMIC reaction.

• Baking cake

• Firecracker

• Burning fire

• Melting ice

Tick TWO examples of EXOTHERMIC reaction.

• Respiration

• Boiling water

• Ice freezing

• Photosynthesis

Sodium hydroxide pellets are added into water, and the temperature of the solution rises after few seconds. What type of reaction is this?

• ENDOTHERMIC

• EXOTHERMIC

Ammonium chloride crystals are added into water, and the temperature of the solution drops after few seconds. What type of reaction is this?

• ENDOTHERMIC

• EXOTHERMIC

Maria has fever and her mother put KoolFever cooling pad on her forehead. After 6 hours, her body temperature is decreasing. What type of reaction that occurred when the cooling pad was put on her forehead?

• ENDOTHERMIC

• EXOTHERMIC