Energy Changes Flashcards
Describe exothermic
Energy transferred to the surroundings increasing the temperature
Give types of exothermic reaction
Combustion, oxidation and neutralisation
Give examples of two every day exothermic reactions
Self heating cans and handwarmers
Describe endothermic
Energy is taken in from surroundings and the temperature of the surroundings decrease
Types of endothermic reactions
Thermal decomposition and reaction of citric acid and hydrogencarbonate
Every day endothermic reactions
Instant ice packs
How can you remember what endothermic and exothermic reactions do?
Ex for exit and en for enter
What is activation energy?
The minimum amount of energy needed to react
How do you know if a reaction is endothermic on a reaction profile?
The products have higher energy and are higher than the reactants
How do you know if a reaction is exothermic on a reaction profile ?
The products would have less energy than the reactants or the products would be beneath the reactants
Is breaking bonds exo or endothermic?
Endothermic
It’s forming bonds exo or endothermic?
Exothermic
Describe an exothermic reaction
More heat energy is released in making bonds in the products then is taken in when breaking bonds in the reactants
Describe an endothermic reaction
Less heat energy is released in making bonds in the products that is taken in one breaking bonds in the reaction
How do you calculate energy change?
Energy in Takeaway energy out
How do you calculate energy change?
Energy in Takeaway energy out
