U1M2.pdf - U1M2 Sunday September 1 2019 5:45 PM Modeling Matter → Simplified representations of objects or processes built to better describe explain

U1M2.pdf - U1M2 Sunday September 1 2019 5:45 PM Modeling...

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Modeling Matter Simplified representations of objects or processes built to better describe, explain, and behavior Some models are concrete while some are abstract Particulate Model of Matter Aristotelians thought that all substances were composed elementary principles (wa substance its characteristic property depending on the proportion in which they we Leucippus and Democritus thought of matter as made up of small indivisible partic space Particulate model of matter: proposes that all substances are composed of small pa Can be used to explain and predict the physical properties of many materials 3 Basic Assumptions of particulate model of matter Any macroscopic sample of a substance is composed of an extremely large n The particles of matter are conceived to be so small that they cannot be optical microscope § Most substances are made of particles of Nanometer (10^ - 9) size § Particles could represent anything (atoms, molecules, ions) § Particles of matter are constantly moving in random directions through empty As temperature increases, speed of particles increase § Temperature can be seen as a measure of the average kinetic energy pe § If the average kinetic energy is the same, the lighter particles should ha particles at any given temperature § Pressure = force/area Pressure is "number of collisions" § The heavier the particles = slower they move, the lower the temperature § Particles interact with each other and the strength of these interactions depen Particles attract each other at relative long distances but repel each othe § Without repulsive and attractive interactions between their particles, all phase §
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