Chemical Reactions Flashcards
Energy of breaking bonds
Energy is needed to break bonds
Results in +ΔH
Energy of making bonds
Energy is lost when bonds are made
Results in -ΔH
Endothermic Reaction
A reaction where the products have more energy than the reactants, so absorbs energy (+ΔH)
Results in decrease of temperature
Exothermic Reaction
A reaction where the products have less ennergy than the reactants, so releases energy (-ΔH)
Results in increase of temperature
Ionic Bonds
Between metal & non-metal
Covalent Bonds
Between non-metals
Metallic Bonds
Between Metals
Catalyst
A substance that increases the rate of a chemical reaction
Not used up during the reaction
Respiration
glucose + oxygen -> carbon dioxide + water
Exothermic reaction
Hydrolysis
Digestion
Incorporates water into larger structures, breaking them down.
Double decomposition reaction
Photosynthesis
carbon dioxide + water → glucose + oxygen
Endothermic reaction
Reaction rate differences between combustion and resperation
Combustion relaeases energy all at once, while respiration releases it in small steps.
