Endothermic And Exothermic Reactions Flashcards
what is a endothermic reaction
a reaction which takes in energy from the surroundings, usually in the form of heat and is usually shown by a fall in temperature of the surroundings
what is an exothermic reaction
a reaction which gives out energy to its surroundings, usually in the form of heat and usually shown by a rise in temperature of the surroundings
what do reaction profiles show
the energy levels of the reactants and the products in a reaction
what can you use a reaction profile to do in terms of exo and endothermic reactions
you can use it work out if energy is released (exothermic) or taken in (endothermic)
how is an exothermic reaction shown on a reaction profile
the products are at a lower energy level than the reactants
what does the difference in height in a reaction profile represent
the energy given out or taken in, in the reaction
how is an endothermic reaction shown on a reaction profile
the products are at a higher energy level than the reactants
what is activation energy
the minimum amount of energy needed for bonds to break and for a reaction to happen
what indicates the activation energy in a reaction profile
the difference between the reactants and the highest point on a curve
what would happen if the energy input is less than the activation energy
there wont be enough energy to start a reaction, so nothing would happen
