bond v. standard

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josmit_1D
Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

bond v. standard

Postby josmit_1D » Sun Jan 26, 2020 3:12 pm

what is the difference between bond enthalpies and standard enthalpies of formation?

Jessica Booth 2F
Posts: 101
Joined: Fri Aug 30, 2019 12:18 am

Re: bond v. standard

Postby Jessica Booth 2F » Sun Jan 26, 2020 3:15 pm

Bond enthalpies are the energy required to break a bond, while standard enthalpies of formation are the reaction enthalpies for the formation of 1 mol of a substance from its elements in their most table form.

Adam Kramer 1A
Posts: 103
Joined: Sat Aug 24, 2019 12:15 am

Re: bond v. standard

Postby Adam Kramer 1A » Sun Jan 26, 2020 3:16 pm

Bond enthalpy is the change in energy of a certain bond when broken or formed, not being strict about the form of the reactants or products. Standard enthalpy is the change in energy when all reactants and products are in their "standard state", meaning they are at 1 atmosphere, and 1 molar for a solution, or a pure solid or liquid. Standard enthalpy of formation is the standard enthalpy for the formation of one mole of a substance from its elements in their most stable form.

Kaylee Sepulveda 4G
Posts: 100
Joined: Thu Jul 11, 2019 12:16 am

Re: bond v. standard

Postby Kaylee Sepulveda 4G » Sun Jan 26, 2020 3:17 pm

Bond enthalpy is the energy needed to break a bond like C-H. Enthalpy of formation is the energy needed to form a substance from its pure components.

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Areena H 2K
Posts: 81
Joined: Wed Dec 05, 2018 12:18 am

Re: bond v. standard

Postby Areena H 2K » Sun Jan 26, 2020 6:08 pm

Bond enthalpies are the amount of energy required to break bonds while standard enthalpies are the change sof enthalpy during the formation of 1 mole of the substance from its elements

Megan Kirschner
Posts: 46
Joined: Wed Feb 20, 2019 12:17 am

Re: bond v. standard

Postby Megan Kirschner » Sun Jan 26, 2020 7:16 pm

Yea so essentially: standard enthalpies are the change of enthalpy during the formation of 1 M of the substance from its elements needed to make it, but bond enthalpies are the amount of energy required to break bonds. How I remember it is bond is B for break, and standard is s for synthesize.


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