Find ΔH^0_f for OH(g): ΔH^{0}_{diss} Explained

Dell · 2009-04-28T10:59:50+00:00

find ΔH^{0}_{f} for OH(g) if H2O2 (g)--> 2OH(g) ΔH^{0}_{diss}=213KJ/mol what is ΔH^{0}_{diss}?? what is 'diss'

Thread starter Dell
Start date Apr 28, 2009
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Chemistry

In summary, ΔH^0_f is the standard enthalpy of formation, which measures the energy change when a compound is formed from its constituent elements. It is calculated by subtracting the standard enthalpies of formation of reactants from products. ΔH^0_f is important for determining a compound's stability and potential for chemical reactions. ΔH^{0}_{diss} is the standard enthalpy of dissolution, which measures the energy change when a substance is dissolved in a solvent. It can be used to calculate ΔH^0_f by considering the enthalpy change of dissolving the compound and the enthalpy change of formation of the dissolved ions.

Apr 28, 2009

Dell

find ΔH[tex]^{0}_{f}[/tex] for OH_(g) if

H₂O₂ _(g)--> 2OH_(g)

ΔH[tex]^{0}_{diss}[/tex]=213KJ/mol

what is ΔH[tex]^{0}_{diss}[/tex]?? what is 'diss'

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Apr 30, 2009

Astronuc

Staff Emeritus

Science Advisor

2023 Award

Most likely, diss = dissociation.

May 1, 2009

Dell

i don't think i have learned dissociation yet, unless it has another name??
so how would i solve this?

1. What is ΔH^0_f?

ΔH^0_f, or the standard enthalpy of formation, is a measure of the energy change that occurs when one mole of a compound is formed from its constituent elements in their standard states.

2. How is ΔH^0_f calculated?

ΔH^0_f is calculated by subtracting the sum of the standard enthalpies of formation of the reactants from the sum of the standard enthalpies of formation of the products.

3. What is the significance of ΔH^0_f?

ΔH^0_f is a useful measure in determining the stability of a compound and its potential to undergo chemical reactions. It can also be used to calculate the ΔH^0_rxn of a reaction.

4. What is ΔH^{0}_{diss}?

ΔH^{0}_{diss}, or the standard enthalpy of dissolution, is a measure of the energy change that occurs when one mole of a substance is dissolved in a solvent.

5. How is ΔH^{0}_{diss} related to ΔH^0_f?

ΔH^{0}_{diss} can be used to calculate the ΔH^0_f of a compound by considering the enthalpy change of dissolving the compound and the enthalpy change of formation of the dissolved ions.