Given that H2(g)+F2(g)⟶2HF(g)       Δ?∘rxn=−546.6kJ 2H2(g)+O2(g)⟶2H2O(l)  Δ?∘rxn=−571.6 kJ   calculate the value of ΔHrxn∘ for 2F2(g)+2H2O(l)⟶4HF(g)+O2(g) Δ?∘rxn= ?kJ

Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter9: Energy And Chemistry
Section: Chapter Questions
Problem 9.41PAE: 9.41 Under what conditions does the enthalpy change equal the heat of a process?
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Given that

H2(g)+F2(g)⟶2HF(g)       Δ?∘rxn=−546.6kJ
2H2(g)+O2(g)⟶2H2O(l)  Δ?∘rxn=−571.6 kJ
 
calculate the value of ΔHrxn∘ for

2F2(g)+2H2O(l)⟶4HF(g)+O2(g)

Δ?∘rxn= ?kJ

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