Thermic example sentences

Reactions in which heat is given out along with the products are called exothermic reactions.The negative sign of enthalpy change indicates that this is an exothermic reaction.Reactions in which heat is released along with the formation of products are called exothermic chemical reactions.For strongly endothermic reactions, the value of ?rH0 may be large and positive.?H is negative for exothermic reactions which evolve heat during the reaction and ?H is positive for endothermic reactions which absorb heat from the surroundings.In such cases, K will be much larger than We may expect strongly exothermic reactions to have a large K, and hence can go to near completion.Similarly in an endothermic reaction, heat is absorbed, qp is positive and ?rH will be positive.In case of exothermic reactions, ?rH0 is large and negative, and ?rG0 is likely to be large and negative too.In an exothermic reaction, heat is evolved, and system loses heat to the surroundings.Reactions in which energy is absorbed are known as endothermic reactions.The decrease in enthalpy in passing from reactants to products may be shown for any exothermic reaction on an enthalpy diagram as shown in Figureure 10(a).Let us consider the formation of NH3 from dinitrogen and dihydrogen which is highly exothermic reaction and proceeds with decrease in total number of moles formed as compared to the reactants.For most of the ionic compounds, ?sol H0 is positive and the dissociation process is endothermic.By analogy, we may be tempted to state that a chemical reaction is spontaneous in a given direction, because decrease in energy has taken place, as in the case of exothermic reactions.Melting of a solid is endothermic, so all enthalpies of fusion are positive.