Reactivity 1.1
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13 Terms
System
represents the reaction, chemical, or substance that is being studied and analyzed
Surroundings
everything that isn’t in the system
Heat (q)
the transfer to thermal energy from a higher temperature object to a lower temperature object
Work (w)
the energy required to move an object against a force
Words associated with Heat
lost, evolves, releases, gives off
Words associated with cold
gains, absorbs, takes in
Symbol for when the system does work on the surroundings
-w
Symbol for when the surroundings does work on the system
+w
Internal Energy
the total energy from all forms of kinetic and potential energy of a system
Internal Energy Formula
change in energy = q + w
Work Formula
w = -P * change in volume
Heat Formula
mc * change in temperature
Enthalpy
the amount of heat released or absorbed during a chemical reaction