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16 Cards in this Set
- Front
- Back
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Front (Term) Energy |
The ability to do work or transfer heat. |
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Work: Def and Equation |
Energy used to cause an object that has mass to move.
W= force x distance
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Heat |
- Energy used to cause the temperature of an object to rise.
- Always flows from a hotter body to a colder body |
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Potential energy vs. Kinetic Energy |
Potential Energy: Result of gravity pulling downwards.
Kinetic Energy: Energy of motion
Ex: when a ball rolls down a hill, Kinetic Energy increases and potential energy decreases |
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Different forms of energy (4) |
Chemical Energy Mass energy Thermal energy Merchanical energy Electrical energy |
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Thermodynamics |
The study of the transfer and movement of energy.
Thermo(heat) Dynamics(movement) |
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Thermodynamic Terms: System, Boundary, Surroundings |
System: the part of the universe under investigation (The molecules we want to study)
Boundary: confines and separates the system from its surroundings
Surroundings: everything but the system |
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Types of systems (3) |
Open systems: exchange both matter and energy with the surroundings
Closed systems: exchanges heat but not matter with the surroundings
Isolated systems: does not exchange heat or matter what the surroundings |
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Path (thermodynamics) |
A description of all intermediate states in a change of state |
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First law of Thermodynamics |
Energy is neither created nor destroyed
- The total energy of the universe is constant - if the system loses energy, it must be gained by the surroundings. |
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Internal energy of a system(E): Def and Equation |
The sum of all Connecticut and potential energy's of all components of the system
E= potential + kinetic |
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Endothermic vs. Exothermic: What happens to temp? |
Endothermic: when he is absorbency the system from its surroundings. Temperature decreases, gets cold
Exothermic: when heat is released by the system to the surroundings. Temperature increases, gets hot |
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Calorimetry |
Measurement of heat flow/heat exchange |
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Heat Capacity in joules/k or j/c |
Amount of energy required to raise the temperature of substance or object 1 Kelvin or 1 Celcius |
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Specific Heat Capacity |
Amount of energy required to raise the temperature of ONE gram of a substance by 1K or 1C |
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Enthalpy/ Change in Enthalpy |
The amount of heat content used to release in the system at constant pressure |
