Chemistry Practice Problems Hess's Law Practice Problems Solution: The values for the enthalpy of reaction are given ...

🤓 Based on our data, we think this question is relevant for Professor Knuckley's class at UNF.

Solution: 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

Problem

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