Energetics and kinetics GapFill

Reactions that give out or take in heat energy are said to be  antithermic and prothermicprothermic and antithermicexothermic and endothermicendothermic and exothermic, respectively. The process of measuring the change in heat energy associated with a reaction is called  actinometryergometrycalorimetryspectrometry. It relies on recording the temperature change of a substance of known mass and  specificparticulardiscretedefinite heat capacity. When measured at a constant pressure, the change in heat energy associated with a reaction is a called an enthalpy change, represented by the symbol Δ  EGHS.   Haber'sHess'sPlanck'sAvogadro's law states that the enthalpy change of a reaction is equal to the sum of the enthalpy changes for any steps the reaction can be broken into.

For chemical reactions to take place, reactant particles must collide with the correct orientation and with sufficient energy (called the   instigationactivationstimulationinitiation energy). This energy value is given by the difference between the reactant energy and the energy of the   medialmutationmigrationtransition state. Species that increase the rate of reaction by providing an alternative reaction pathway where this value is lower are called   catabolitescatalystscataphyllscataloes.