Energy Flashcards
What is an exothermic reaction?
When the total energy of the reactants is more than the products due to energy being released to the surroundings.
What is an endothermic reaction?
When the total energy of the reactants is less than that of the products, as energy is taken from the surroundings.
What happens to the surrounding’s temperature during an endothermic reaction?
The temperature decreases as energy is drawn into the reaction for it to occur.
What happens to the surrounding’s temperature during an exothermic reaction?
The temperature increases as energy is released into the surroundings.
What is the activation energy?
The amount of energy required for a reaction to occur.
What does it mean if a reaction has a high or low activation energy?
If a reaction’s activation energy is low it means that it requires less energy for the reaction to occur, meaning that it is more reactive than a reaction that has a high activation energy.
What are examples of exothermic reactions?
-Burning
-Rusting
What are examples of endothermic reactions?
-Photosynthesis
Making bonds _____ energy
Release
Breaking bonds ____ energy
Need
How do you calculate energy change?
Energy required to break bonds - energy released from making bonds.
