Given the following reactions, use Hess’s law to determine the overall enthalpy change for the following reaction (ΔHrxn).  Please show your work or write out the steps for how you determined the answer. NH3(g) + HCl(g)  →  NH4Cl(s)                           N2(g) + 3 H2(g) → 2 NH3(g)                              ΔH =  –92 kJ    H2(g) + Cl2(g) →  2 HCl(g)                               ΔH =  –185 kJ   N2(g) + 4 H2(g) + Cl2(g) →. 2 NH4Cl(s)              ΔH =  –629 kJ

Chemistry for Engineering Students
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Chapter9: Energy And Chemistry
Section: Chapter Questions
Problem 9.73PAE: 9.73 Without looking up any numerical data or doing calculations, predict whether the enthalpy...
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Given the following reactions, use Hess’s law to determine the overall enthalpy change for the following reaction (ΔHrxn).  Please show your work or write out the steps for how you determined the answer.

NH3(g) + HCl(g)  →  NH4Cl(s)

 

                       

N2(g) + 3 H2(g) → 2 NH3(g)                              ΔH =  –92 kJ 

 

H2(g) + Cl2(g) →  2 HCl(g)                               ΔH =  –185 kJ

 

N2(g) + 4 H2(g) + Cl2(g) →. 2 NH4Cl(s)              ΔH =  –629 kJ

 

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