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Solution: The values for the enthalpy of reaction are given for two re...

Question

The values for the enthalpy of reaction are given for two reactions below

Mg(s) + Na 2CO3(s) → 2 Na(s) + MgCO 3(s)           ΔH rxn = 317.1 kJ

 

Mg(s) + 2 NaF(s) → 2 Na(s) + MgF 2(s)                ΔH  rxn = 35.6 kJ

 

Based on this information, what is the value for ΔH rxn for the reaction

MgCO3(s) + 2 NaF(s) → Na 2CO3(s) + MgF2(s)

a. + 352.7 kJ

b. + 281.5 kJ

c. + 245.9 kJ

d. - 281.5 kJ

e. - 352.7 kJ