Chapter 5 - Energy and Change

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20 Terms

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Nuclear binding energy
________: energy associated with the strong force that holds a nucleus together.
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Specific Heat Capacity (C)
________: amount of energy needed to raise temperature of one gram of substance 1 celsius or 1 kelvin.
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Natural gas
________ is around 37 % efficiency.
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Thermochemistry
________: the study of energy involved in chemical reactions.
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Enthalpy of vaporization
________, ∆Hvap: the enthalpy change for the phase change from liquid to gas.
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Thermodynamics
________: a study of energy and energy transfer.
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mc2E
C2= 9.0 × 1016 m2 /s2 and E= ________ is energy in kg • m2 /s2 (J) is the mass in kgc2 is the square of the speed of light.
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nuclear reactions
In ________, a significant amount of the mass of the reactants is actually converted into energy.
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Calorimeter
________: measure enthalpy changes for chemical and physical reactions.
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Enthalpy changes
________ represent the heat change between products and reactants at a constant temperatureShould be open to atmosphere.
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Thermochemical equation
________: a balanced chemical equation that indicates the amount of heat that is absorbed or released by the reaction it represents (in kJ)
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Heat capacity
________ (C): heat of sample, object, or system to its change in temperature.
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Nuclear fission
________: A heavy nucleus undergoing split into lighter nuclei which releases energy.
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Enthalpy, H
total internal energy of a substance at constant pressure.
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Renewable
________: solar energy can give a constant source of energy.
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Enthalpy increases
________ as energy are absorbed in an endothermic reaction.
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Exothermic reaction
________: net release of energy-)
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Nuclear fusion
________: two smaller nuclei fusing to form a larger nucleus Chapter 5.2: Determining Enthalpy of Reaction by Experiment.
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Mass defect
________: difference in mass between a nucleus and its nucleons.
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Enthalpy change
________ is independent of the pathway of the process and the number of intermediate steps in the process.