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C7.2 Using energy transfers from reaction
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Total cards: 4•Content version: v4•Public deck•Updated: 8/1/2026
Card preview (4)
#1
Front (Question)
How do body warmers work?
Back (Answer)
➢ Use exothermic reactions to warm you up ➢ Some can only be used once ➢ Some can be used lots of times
#2
Front (Question)
How do self heating cans work?
Back (Answer)
➢ You press a button in the base of the can ➢ This breaks a seal and lets the water and calcium oxide mix ➢ Then the exothermic reaction begins ➢ Which transfer energy to the substance that needs heating
#3
Front (Question)
How do chemical cold packs work?
Back (Answer)
➢ Ammonium nitrate in it dissolves - it absorbs energy from it surroundings making them colder ➢ Endothermic reaction
#4
Front (Question)
How can you chill cans of drinks?
Back (Answer)
➢ Using endothermic reactions