Matter and Energy
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37 Terms
energy
capacity to do work
every change in matter involves
a change in energy
energy can be
either released or absorbed
sublimation
solid to gas
melting
solid to liquid
evaporation
liquid to gas
freezing
liquid to solid
condensation
gas to liquid
deposition
gas to solid
sublimation
endothermic
melting
endothermicev
evaporation
endothermic
freezing
exothermic
condensation
exothermic
deposition
exothermic
endothermic process
any change in matter in which energy is absorbed
going to right
exothermic
any change in matter in which energy is released
going to the left
law of conservation of energy
energy cannot be created or destroyed, only changes from one form to another
body heat transfers to
cooler objects (ex- metal spoon feels colder when you touch it bc of this)
energy is transferred in
xxxxxxx
heat
energy transferred between objects that are different temperaturese
energy can be ___ as heat
released, absorbed
heat is different from
temperature
temperature
measurement of how hot or cold something is
temperature (T)
expressed in different scales- Fahrenheit, Celsius, Kelvin
equation to convert C to K
C=K-273
why would an object have a different heat/energy depsite being the same temperature?
each object conducts heat and energy differently
bonds between ice cubes breaking
melting
bonds between water forming
freezing
specific heat capacity
amount of heat needed to increase the temperature of a 1g substance by 1C
q=
heat
=m*c*deltaT
m=
mass
=q/c*deltaT
c=
specific heat capacity
=q/m*deltaT
deltaT
change in temperature
=q/m*c
T2
(q/m*c)+T1
T1=
=(-q/m*c)+T2
joules
unit of heat