1st and 2nd Laws of Thermodynamics

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1st and 2nd Laws of Thermodynamics

• Energy can not be created or destroyed only
  changed
• When energy is transformed, some energy is lost
  as heat (entropy increases)
• 2 Types of reactions in organisms
• 1. Exergonic release more energy than used
• 2. Endergonic input of e exceeds output

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Activation Energy

• All reactions need energy to get started
• (existing bonds must be broken)
• Catalysts (enzymes)
• -lower activation energy, thus
• speed up reactions