Energy Changes And Rates Of Reaction Flashcards
activation energy
the minimum energy needed for a reaction to take place
bond energy
the energy required to break a specific chemical bond
endothermic
a reaction that takes in energy from the surroundings
exothermic
a reaction that transfers energy to the surroundings
reaction profile
the relative difference in the energy of reactants and products
activation energy
the minimum energy needed for a reaction to take place
anhydrous
describes a substance that does not contain water
atmosphere
the relatively thin layer of gases that surround plant Earth
catalyst
a substance that speeds up a chemical reaction by providing a different pathway for the reaction that has a lower activation energy. The catalyst is chemically unchanged at the end of the reaction
climate change
the change in global weather patterns that could be caused by excess levels of greenhouse gases in the atmosphere
closed system
a system in which no matter enters or leaves
collision theory
an explanation of chemical reactions in terms of reacting particles colliding with sufficient energy for a reaction to take place
equilibrium
the point in a reversible reaction at which the forward and backward rates of reaction are the same. Therefore, the amounts of substances present in the reacting mixture remain constant
hydrated
Describes a substance that contains water in its crystals
Le Châtelier’s Principle
when a change in conditions is introduced to a system at equilibrium, the position of equilibrium shifts so as to cancel out the change
