For which of the following reactions is ΔH∘rxn equal to ΔH∘f of the product(s)?

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For which of the following reactions is ΔH∘rxn equal to ΔH∘f of the product(s)?You do not need to look up any values to answer this question.Check all that apply.Check all that apply. Na(s)+12Cl2(g)→NaCl(s)CO(g)+12O2(g)→CO2(g)C(s,graphite)+O2(g)→CO2(g)BaCO3(s)→BaO(s)+CO2(g)2Na(s)+Cl2(g)→2NaCl(s) Na(s)+12Cl2(l)→NaCl(s)

Jace Toy DDS · Accepted Answer

The standard enthalpy of formation is defined as the change in enthalpy when one mole of a substance in the standard state (1 atm of pressure and 298.15 K) is formed from its pure elements under the same conditions.Yes: Na(s)+1/2Cl2(g)→NaCl(s) ; should be ½ not 12Cl2(g)NO CO(g)+12O2(g)→CO2(g) : CO is a compound Yes: C(s,graphite)+O2(g)→CO2(g) NO :BaCO3(s)→BaO(s)+CO2(g) NO: Na(s)+Cl2(g)→2NaCl(s) since 2 moles of NaCl are formedNO :Na(s)+1/2Cl2(l)→NaCl(s) since Cl2 is not a liquid at 1atm and 298 Kelvin

Harmon Keeling

For which of the following reactions is ΔH∘rxn equal to ΔH∘f of the product(s)?

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