Gambon has played the eponymous mystery writer protagonist in the BBC television serial The Singing Detective, Jules Maigret in the 1990s ITV serial Maigret, and Professor Albus Dumbledore in the Harry Potter films after the death of actor Richard Harris who played the part in the first two Harry Potter films.
Exothermic reaction. An exothermic reaction is a chemical reaction that releases energy by light or heat. It is the opposite of an endothermic reaction. Expressed in a chemical equation: reactants â products + energy. Exothermic Reaction means exo meaning releases and thermic means heat. So the reaction in which there is release of heat with or without light is called exothermic reaction.
Endothermic reactions absorb energy from the environment, while exothermic reactions release energy to the environment. Distinguish between endothermic and exothermic reactions. 1  All chemical reactions involve the transfer of energy.  Endothermic processes require an input of energy to proceed and are signified by a positive change in enthalpy.