Energy And Rates Flashcards
What is an endothermic reaction?
A reaction that absorbs thermal energy from the surroundings and will feel cold.
What is an exothermic reaction?
A reaction that release thermal energy to the surroundings and will feel warm
Give an example of one endo and one exothermic reaction
Endo - photosynthesis
Exo - respiration
What is concentration?
The measure of the number of particles in a solute dissolved in a solvent
Name two ways to measure the rate of reaction?
Measure how much product is produced in a chemical reaction in a given time
Measure how the reaction is used up in a given time
When is a reaction endothermic?
When the energy needed to break bonds in the reactants is greater than the energy released to the surroundings on making new bonds in the products.
When is a reaction exothermic?
When the energy needed to break bonds in the reactants is less than the energy released to the surroundings on making new bonds in the products
