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Chemistry test UNIT 2 review-INTRO notes
Terms in this set (16)
Why is gas matter?
1. it takes up space (volume)
2. it has mass
what is pressure?
collisions of gas particles with a surface (the amount of force exerted on a certain amount of space)
what is the equation for pressure?
how are collisions and pressure related?
collisions generate pressure
one can increase pressure on a specific area by
decreasing area or increasing force
what are four units used to measure pressure?
atm (atmosphere), mm of Hg (millimeters of mercury), In of Hg (inches of mercury), and Kpa (kilopascals)
what is volume?
the amount of space an object takes up
what is temperature?
the average kinetic energy of particles within a substance
what are 3 units of temperature?
°C, °F, K
what is heat?
the movement of thermal energy (from hot to cold areas)
what is thermal energy?
the measure (sum) of all kinetic and potential energy (changes depending on mass and temperature)
mass times acceleration
the faster particles move, the ______ the temperature gets, the ______ the thermal energy, leading to _______ force
higher; higher; higher
to increase pressure, one could
decrease volume, add more mass or more heat
what is a barometer?
a device that measures pressure by measuring the collisions in atmospheric particles (typically it measures in mm Hg or in Hg)
1 atm = ____ KPa = ____ N/M² = ____ mm Hg
101.3; 100.000; 760
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