Thermochemistry and Energy Change in Chemical Reactions

The negative change in enthalpy (ΔH)

Exothermic reactions occur spontaneously because they are thermally favored, with the products having lower energy than the initial reactants.

Different forms, such as heat and light

<p>Thermochemistry is a branch of thermodynamics that focuses on the energy changes that take place during chemical reactions.</p> Signup and view all the answers

<p>The excess energy becomes the energy needed to initiate and propagate the reaction.</p> Signup and view all the answers

<p>From the Greek words 'exo' meaning 'out' and 'thermos' meaning 'heat'</p> Signup and view all the answers

<p>The Law of Conservation of Energy states that energy is neither created nor destroyed in a system, but rather, it is transformed from one form to another.</p> Signup and view all the answers

<p>Energy change refers to the movement of energy within a system, whether the system is gaining or losing energy.</p> Signup and view all the answers

<p>Chemical reactions, phase changes, mechanical work, electrical circuits, and biological processes.</p> Signup and view all the answers

<p>A typical reaction occurs in three stages: (1) initiation, (2) propagation, and (3) termination.</p> Signup and view all the answers