Basics of Chem 2 Review

Basics of Chem 2 Review - A ndrew Rosen Energy Vocabula ry...

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Andrew Rosen Energy Vocabulary: System: The piece of the universe being tested and its surroundings. Heat: The energy transferred as a result of a temperature difference. Endothermic: When energy is absorbed in a reaction. It gets warmer. (Example: Melting) Exothermic: When energy is releases in a reaction. It gets cooler. (Example: Freezing) Calorimeter: Measures the energy given off or absorbed during a reaction. Specific Heat: The heat needed to raise the temperature of one gram of a substance by one degree Celsius. Activation Energy: The minimum amount of energy needed to perform an endothermic or exothermic reaction. q=(m)( T)(Cp) Δ Energy=mass*change in temperature*specific heat (m)( T)(Cp) = (m)( T)(Cp) Δ Δ Heat loss = heat gain Motion and Physical States Vocabulary Absolute Zero: The temperature at which all molecular motion should cease. (-273°c = 0K) Kinetic Molecular Theory: Matter is composed of small particles. Particles are always in motion. Energy is transferred from collisions.
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