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Lecture 1

CHEM 101 Lecture Notes - Lecture 1: Kinetic Energy, Intermolecular Force, Chemical Bond


Department
Chemistry
Course Code
CHEM 101
Professor
Anita Gnezda
Lecture
1

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Chapter 1, Lecture 1: Matter and Energy
Chemistry- the study of matter
Matter- anything that has mass and takes up space
States of Matter: Solid, Liquid, Gas, Plasma
A change in energy accompanies a change in state.
In each state of matter, the molecules stay the same, they simply take different forms.
Ex. H2O will remain H2O whether it takes the form of ice, water, or steam.
The Kinetic-Molecular View of Matter
The state of matter depends on two opposing forces…
Attraction and Repulsion.
Intermolecular forces- keep atoms together
Molecule- more than one atom bonded together by a chemical bond
Kinetic Energy (KE) and Potential Energy (PE)
Kinetic energy: pulling atoms apart through motion
Increasing temperature increases motion
Energy- the capacity to do work
Work- motion of an object against an opposing force
Thermochemistry: heat associated with chemical reactions
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