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30 Cards in this Set
- Front
- Back
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Molecules move around faster & spread out or expand in the.. |
Gas phase |
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When a solid reaches its melting point it becomes a... |
Liquid |
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Reactions that produce heat |
Exothermic reactions |
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Does not change the atomic makeup of a molecule |
Physical |
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Reactions that occur when a chemical substance loses electrons to another substance |
Oxidation |
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Corrosion is an oxidation reaction, occurring when _______ is in contact with ________ |
Metal Oxygen |
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The motion of atoms and molecules creates energy called |
Heat |
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Electrical energy is converted into ________ when you use objects such as heating pads |
Thermal |
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A measure of average thermal energy |
Temperature |
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State of matter where the molecules are traveling in random directions at a variety of speeds |
Gas |
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The ratio of the heat capacity of a substance to the heat capacity of a reference substance |
Specific heat |
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The specific heat of some other substance relative to water will be numerically _______ to its heat capacity |
Equal |
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The measurement of heat and the determination of heat capacity |
Calorimetry |
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The units of heat measurement |
Calorie, BTU, joule |
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Always happens at the same point in the reaction no matter where you start |
Equilibrium |
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As molecules evaporate, vapor pressure |
Increases |
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A change of state from liquid to gas at a constant temperature required the input of |
Energy |
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The temperature at which heat fusion occurs is the |
Melting point |
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The heat fusion of water is |
79.72 calories per gram |
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Force divided by area |
Pressure |
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Measure of the mean kinetic energy of the gas |
Temperature |
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The sum of the mass of the molecules divided by the volume the gas occupies |
Density |
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4 variables in a gas that can be altered |
Temperature, pressure, volume, amount of gas. |
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The volume of a gas varies depending on the |
Pressure & temperature |
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Temperature must be in _____ when using the combines gas law formula |
Kelvins |
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Dalton observed that the ______________ of a gas mixture was the sum of the partial pressure of each gas |
Total Pressure |
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The passage of a gas through a tiny orifice into an evacuated chamber |
Effusion |
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The spread of a gas through a space or second substance |
Diffusion |
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The pressure exerted by a vapor in a state of equilibrium with its liquid at a given temperature is called |
Equilibrium vapor pressure |
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At a fixed pressure, the ______ of a gas is proportional to the ______ of the gas |
Volume Temperature |
