Chemistry Exam Chapter 10 and 12 – Flashcards
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| the term for a change in the physical state of a substance is _____ |
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| phase change |
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| The pressure resulting from the collision of air molecules with objects is ___ |
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| Atmospheric pressure |
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| The pressure above a liquid in a sealed container caused by collision of vaporized particles with the walls of the container is ______ |
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| Vapor pressure |
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| The assertion that the tiny particles in all forms of matter are in constant motion is _____ |
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| Kinetic Theory |
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| The energy an object has due to its motion is _____ |
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| kinetic energy |
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| A device used to measure atmospheric pressure is a _____ |
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| barometer |
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| Which temperarure scale provides a direct measure of the average kinetic energy of a substance? |
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| Kelvin |
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| What is the SI unit of pressure |
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| pascal |
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| How does the apmospheric pressure at altitudes below sea level compare with atmospheric pressure at sea level? |
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| The atmospheric pressure below sea level is higher |
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| Collisions between gas molecules are _____ |
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| elastic |
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| According to the kinetic theory of gasses ___. |
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| the particles of a gas move ind. of each other, they move rapidly, and the particles in a gas are far apart |
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| The temp. at which the motion of particles theoretically ceases is ____ |
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| 0 k |
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| The pressure of a gas in a container is 152 mm Hg. This is equivalent to _____ |
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| 0.2 atm |
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| For a given mass of gas at constant temp. , the volume of the gas varies inversely with pressure is ______ |
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| boyles law |
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| The volume of a fixed mass of gas is directly proportional to its kelvin temp., if the pressure is kept constant is _____ |
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| Charles law |
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| The pressure of gas is directly proportional to its kelvin temp if the volume is kept constant is _____ |
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| Gay-Lussac's law |
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| At constant volume and temp. the total pressure exerted by a mixture of gases is equal to the sum of the partial pressure is _____ |
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| daltons law |
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| P x V = n x R x T is _____ |
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| ideal gas law |
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| Why does air leave a tire when the tire valve is opened |
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| bc the pressure outside the tire is lower than the pressure inside the tire |
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| If the volume of a container holding a gas is reduced, what will happen to the pressure within the container |
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| the pressure will increase |
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| If a balloon is squeezes what happens to the air pressure within the balloon |
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| it increases |
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| If a balloon is rubbed vigorously what happens to the pressure of the air inside the balloon if the volume remains conatant |
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| it increases |
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| The combined gas law relates to ____ , _____, and _____ |
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| temp, pressure, and volume |
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| If the atmospheric pressure on mt. everest is one-third the atmospheric pressure at sea level, the partial pressure of oxygen on everest is ____ |
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| one-third that at sea level |
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