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New Ch9 Lesson

Chapter 9B

Distance Divided by Time speed
the unit of speed m/s
change in speed or direction velocity
velocity has the same _______ as speed except it has ______ magnitude, direction
change in velocity Acceleration
unit of acceleration m/s/s
A push or a pull Force
In order to accelerate an object, a _____ must be _____ force, applied
_______ is done when a force is applied work
Force = Mass * Acceleration
The unit of force kg.m/s squared) * m = kg.m squared/s squared = Joule
the unit of energy is the joule
1 kJ = 1000 J
1 cal = 4.184 J
1 kcal = 4.184 kJ
energy due to position or stored energy Potential energy
ex of Potential energy Food(chemical energy)
Formula to calculate Potential Energy PE=m.g.h
energy due to MOTION kinetic energy
Formula for kinetic energy KE=1/2 mu squared
energy of a molecule or atom when it moves from one place to another translational kinetic energy
energy results from when a molecule or atom flips end over end rotational kinetic energy
the atoms in a molecule or atom vibrate with respect to one another; similar to a spring Vibrational kinetic energy
in any chemical reaction or process, energy is conserved the Law of Conservation of Energy
________ is the sample of matter in the universe system
everything else in the universe that is not part of the system Surroundings
Open System Allows exchange of heat and mass
Closed System Allows exchange of heat but no exchange of mass
Isolated System Does not allow exchange of heat or mass
Process that absorbs or takes in heat is ____ endothermic
Process that releases heat is ____ exothermic
Vaporization endothermic
Fusion endothermic
Condensation Exothermic
Freezing Exothermic
Sublimation Endothermic
Deposition Exothermic
Decomposition of Limestone Endothermic
Decomposition of water Endothermic
Formation of water Endothermic
Formation of water Exothermic
Combustion of carbon exothermic
Created by: Bosschick