Exothermic and endothermic reactions GapFill

Energy is always  discoveredreleasedcreatedconserved during chemical reactions. There may be a change in the  colourpolaritymagnetismtemperature of the surroundings due to energy being taken in or given out by the molecules. Reactions in which the surroundings get warmer are called  exothermicyieldingoxidativeheating, e.g. combustion,  activationneutralisationminingburning and the reactions of  sports injury packsmake-up removershand warmersair conditioners, and reactions in which they get colder are called  resistingreductiveendothermiccooling, e.g. thermal  oxidationhydrogenationdecompositionfractionation reactions. Reactions will only occur if particles collide with sufficient  directionsmassestangentsenergy.

One way of representing reactions is using a reaction  profileslidergradienttable, which shows the energy of the reactants and products. The height of the curve from the reactants is the  activation energyenergy peakinitiation energyenergy debt, and the difference between the reactants and products is the  energy changeenergy costactivation energyenergy product of the reaction.

When bonds are  strengthenedheatedbrokentwisted in the reactants, energy is taken in. When bonds are  formedreactedloosenedreshaped in the products, energy is released. A reaction is exothermic if the energy released is  in a different form togreater thanin the same form asless than the amount taken in.