Exploring Chemical Energy

Chemical energy stored by molecules can be released as heat during chemical reactions.

Methane, cooking gas, and coal are examples of fuels that can release chemical energy when burned.

The chemical energy can be used to do mechanical work in an engine or to provide electrical energy through a galvanic cell.

<p>The subject matter of thermodynamics is the study of energy transformations.</p> Signup and view all the answers

<p>Thermodynamics is based on the initial and final states of a system undergoing the change, rather than how and at what rate the energy transformations are carried out.</p> Signup and view all the answers

<p>Chemical energy can be released as heat or used to do mechanical work during a chemical reaction.</p> Signup and view all the answers

<p>Energy changes of macroscopic systems involving a large number of molecules.</p> Signup and view all the answers

<p>When a system is in equilibrium.</p> Signup and view all the answers

<p>The initial and final states of a system.</p> Signup and view all the answers

<p>To provide electrical energy and to do mechanical work.</p> Signup and view all the answers