Chemical Energetics Flashcards
What are exothermic reactions?
Chemical reactions in which heat is given out
What is bond forming an example of?
Exothermic reaction
What are the energy changes that occur during an exothermic reaction?
Energy released is more than the energy absorbed
Bond forming __ energy
releases
What happens to heat during an exothermic reaction?
Heat is given out and transferred from the chemical to surrounding
What happens to the temperature of the mixture during an exothermic reaction?
Temperature of mixture will rise until the highest temperature is reached, then fall to room temp.
What are the energy transformations that occur during an exothermic reaction?
Transfer chemical to heat energy
What are three common examples of exothermic reactions?
Combustion of fuels Rusting iron Metal corroding Neutralisation between acid and alkali Respiration
What are endothermic reactions?
Chemical reactions in which heat is absorbed/taken in
What is bond breaking an example of?
Endothermic reaction
What are the energy changes that occur during an endothermic reaction?
Energy absorbed is more than the energy released
Bond breaking __ energy
requires
What happens to heat during an endothermic reaction?
Heat is absorbed and transferred from surroundings to reactants
What happens to the temperature of the mixture during an endothermic reaction?
Temperature of mixture falls until lowest temp is reached, then rise until room temp
What are the energy transformations that occur during an exothermic reaction?
Transfer heat to chemical energy
