Thus, the Hammond Leffler Postulate predicts a late transition state for an endothermic reaction and an early transition state for an exothermic reaction.
22.
When the inner bag of water is broken by squeezing the package, it is allowed to dissolve the solid in an endothermic reaction.
23.
Similarly endothermic reactions ( which remove heat ) tend to gain energy as the heat energy is " sucked out " of the environment.
24.
Because of the highly endothermic reaction, the BMA process is of lower importance for the production of HCN compared to the Andrussow process.
25.
Some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions.
26.
This interpretation ignores extremely exothermic and endothermic reactions which are relatively unusual and relates the transition state to the intermediates which are usually the most unstable.
27.
A positive value indicates that heat is absorbed during the formation of the compound from its elements; such a reaction is called an endothermic reaction.
28.
Entropy and enthalpy are different terms, so the change in entropic energy can overcome an opposite change in enthalpic energy and make an endothermic reaction favorable.
29.
In an endothermic reaction, the opposite occurs; the feedback circuit increases the power in order to maintain a constant temperature ( isothermic / isothermal operation ).
30.
However, this is not required; endothermic reactions can proceed spontaneously if the " T " ? " S " term is large enough.
