301 Lecture 2 energy

301 Lecture 2 energy - Chem 301 Lecture 2 Energy Facts...

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Chem 301 Lecture 2 Energy Facts about energy: many different forms -- kinetic (motion), potential (position), chemical (reactivity), electrical (potential difference), heat matter is also a form of energy energy is readily converted from one form to another, but not without restrictions changes in energy can always be attributed to either work or heat (neglecting nuclear reactions) In thermodynamics we are never concerned with "absolute energy", but rather with energy transfers. We do not care how much energy one mole of sugar has, we want to know how much energy is involved in one mole of sugar is burned or metabolized. Heat: heat is energy transferred as a result of temperature differences; if two systems are at the same temperature, no heat can pass between them heat is the most important type of energy in chemical reactions -- all chemical reactions involve heat either being added to the system of being given off by the system (well, once in a great while the heat is zero -- but, as the seasoned surfer said to the
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301 Lecture 2 energy - Chem 301 Lecture 2 Energy Facts...

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