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CHEMISTRY- 7.9 Determining Enthalpies of Reaction from Standard- STUDY GUIDE WITH 100% CORRECT SOLUTIONS $11.49
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CHEMISTRY- 7.9 Determining Enthalpies of Reaction from Standard- STUDY GUIDE WITH 100% CORRECT SOLUTIONS
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CHEMISTRY- 7.9 Determining Enthalpies of Reaction from Standard- STUDY GUIDE WITH 100% CORRECT SOLUTIONS

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  • December 21, 2024
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  • 2024/2025
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  • chemistry 79 determining enthalpies of reaction

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CHEMISTRY- 7.9 Determining Enthalpies of
Reaction from Standard- STUDY GUIDE WITH 100%
CORRECT SOLUTIONS
ΔH - ✔✔Change in enthalpy for a chemical reaction.


Calorimetry - ✔✔Experimental method to measure heat changes.


Hess's Law - ✔✔Method to calculate ΔH using known reactions.


Standard State - ✔✔Reference conditions for measuring enthalpy changes.


Standard Enthalpy Change (ΔH°) - ✔✔ΔH when all substances are in standard
states.


Standard Enthalpy of Formation (ΔH_f°) - ✔✔Enthalpy change for forming 1
mol from elements.


1 bar - ✔✔Standard pressure close to 1 atm.


1 atm - ✔✔Standard atmospheric pressure for gases.


1 M - ✔✔Standard concentration for substances in solution.


Stable Form - ✔✔Most stable state of a substance at standard conditions.

, Pure Substance - ✔✔Substance without impurities at standard state.


Methane Formation - ✔✔ΔH_f° of methane is negative at 25 °C.


Graphite - ✔✔Most stable form of carbon at standard state.


kJ/mol - ✔✔Units for standard enthalpy of formation.


Negative ΔH_f° - ✔✔Indicates exothermic formation of compounds.


Sea Level Analogy - ✔✔Relative measurement for enthalpy changes.


Table 7.5 - ✔✔Lists standard enthalpies of formation for compounds.


Appendix IIB - ✔✔Contains complete list of standard enthalpies.


Chemical Equation - ✔✔Represents enthalpy of formation for 1 mol.


Temperature of Interest - ✔✔Often taken as 25 °C for standard states.


Constituent Elements - ✔✔Elements forming a compound in standard states.


Altitude Analogy - ✔✔Change in enthalpy compared to a defined zero.

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