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Lecture 1

BIOL 1201 Lecture Notes - Lecture 1: Enthalpy, Endergonic Reaction, Thermodynamics


Department
Biological Sciences
Course Code
BIOL 1201
Professor
E.Wischusen
Lecture
1

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Laws Of Thermodynamics
- First law: Energy can neither be created nor destroyed only converted from
one form to another
- Second law: When converting energy fro one form to another the amount of
useful energy decreases
Free Energy and Chemical Reactions
- Spontaneous: Release free energy (exergonic)
o Change in G= -
- Non-Spontaneous: Require free energy (endergonic)
o Change in G= +
Change in Free Energy
- Change in G= Change in H T(Change in S)
o G= Free Energy
o H= Enthalpy (Heat energy contained)
o T= Temperature (K), no negative values
o S= Entropy (Measure of disorder, greater disorder, greater entropy)
What will always result in a spontaneous reaction?
- Enthalpy decrease, entropy increases
Which will always result in a non-spontaneous reaction?
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