Endothermic reaction & Endothermic process

• Endothermic reactions are chemical reactions that absorb energy, tempurature will decrease
• Sodium hydrogencarbonate + citric acid -> sodium citrate + water + carbon dioxide
• Photosynthesis in plants is also an endothermic reactions
• Cooking: heat energy is absorbed by food (endothermic reaction)
• Endothermic processes are not chemical reactions but they also absorb energy from the surroundings.
• Melting: heat energy is absorbed by particles so that the particles gain more energy to vibrate & move more
• Sweatting: sweat helps cool us down when it absorbs heat energy from our body as it evaporation
• Exothermic reaction can be used to heat up food in packets without the need of fire or electricity. Self-heating cans/ self-heating packs.

  Calcium oxide + water -> calcium hydroxide
• Endothermic processes -> ice packs are chemical ice packs. They absorb energy from food or surrounding as it slowly melts.

  Ammonium nitrate + water