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Summary Metabolism and Energy - Chemical Reactions $7.99   Add to cart

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Summary Metabolism and Energy - Chemical Reactions

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An explanation, lesson and study guide on metabolism and energy involving chemical reactions.

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  • July 10, 2023
  • 3
  • 2021/2022
  • Summary
  • Secondary school
  • 12th Grade
  • 1
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Metabolism and Energy
● Metabolism refers to the sum of all chemical reactions that occur in a cell.
● Metabolic pathways are step-by-step sequences of reactions where the product
of one reaction becomes the substrate of the next.
● Anabolic reactions build large molecules, while catabolic reactions break down
large molecules into smaller products.
● Cellular respiration releases chemical potential energy in sugars and makes that
energy available for cellular work.

Defining Energy:
● Energy is the capacity to do work or change/move matter against an opposing
force.
● Potential energy is stored energy, while kinetic energy is the energy of motion.
● Living cells transform potential energy into kinetic energy to perform work.

Chemical Potential Energy:
● Chemical bonds store potential energy, and energy is released when bonds are
formed.
● Free (unbonded) atoms have more potential energy than compounds.




The Laws of Thermodynamics:
● The first law states that energy cannot be created or destroyed but can be
transformed and transferred between objects.
● The second law states that the universe tends towards increasing disorder or
entropy.

Predicting Chemical Reactions:
● Free energy (G) is the energy available to do work in a chemical reaction.

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