Semester 2 review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| measures the heat changes associated with chemical reactions. | Thermochemistry
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| The SI unit of Heat and energy | Joules
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| refers to all the substances taking part in a reaction | system
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| a measure of the average kinetic energy of the particles in a sample. | Temperature
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| the amount of energy required to raise the temperature of one gram of water one degree Celsius. | calorie
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| a dietary calorie (Calorie) | Kilocalorie (1000 calories)
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| the heat content of a system | Enthalpy (H)
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| Means "The change in" something | Delta (Δ)
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| when energy flows into the reaction, and ΔH is positive. Feels cold to the touch. | endothermic reaction
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| when energy flows into the reaction, and ΔH is negative. Feels hot to the touch. | exothermic reaction
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| the amount of energy required to raise the temperature of one gram of a substance one degree Celsius | Specific heat capacity, (cp)
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| a gas in which the particles are considered to have no density and these particles exert no attraction for each other. | ideal gas
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| a gas whose particles have volume and feel an attraction for each other. | real gas
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| The spontaneous mixing of gases by the random motion of their particles | diffusion
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| a process by which gas particles pass through a small opening. | effusion
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| the force per unit area on a surface. | pressure
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| S.I. unit for pressure | pascal
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| an instrument used to measure air pressure | barometer
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| Temperature scale used when describing gasses | Kelvin
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| states that the volume of a fixed mass of gas varies inversely with the pressure at constant temperature. | Boyle's law
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| states that the volume of a fixed mass of gas at constant pressure varies directly with the temperature in Kelvin. | Charles law
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| The point at which gas particles lose all their kinetic energy | absolute zero
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| states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases | Law of partial pressures
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| mixture of 2 or more substances in a single phase | Homogeneous mixture
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| the part of a solution that is being dissolved | solute
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| the part of a solution that does the dissolving | solvent
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| a solution that contains the maximum quantity of solute that dissolves at that temperature. | saturated solution
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| A solution contains less than the maximum amount of solute that can dissolve at a particular temperature | unsaturated solution
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| solutions that contain more solute than is “normally” possible to be dissolved | supersaturated solution
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| reactions that occur in water | aqueous solutions
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| solutions that conduct electricity when in solution or water | electrolytes
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| compounds that dissolve in water but do not conduct electricity | nonelectrolytes
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| The amount of solute in a solution | concentration
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