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

Hess's Law

Hess's Law

#### Q. S(s) + O2(g) → SO2 (g)      ∆H = ‐296.8 kJ 2SO2 + O2 → 2SO3             ∆H = ‐198.4 kJ Write the equation for the formation of sulfur trioxide gas f...

Solved • Wed Jun 14 2017 13:35:24 GMT-0400 (EDT)

Hess's Law

#### Q. Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction: P4(g) + 10Cl2(g) → 4PCl5(s)                ΔH°rxn = ...

Solved • Fri Oct 28 2016 12:33:34 GMT-0400 (EDT)

Hess's Law

#### Q. Coal gasification can be represented by the equation:2 C(s) + 2 H2O(g) → CH4(g) + CO2(g)          ΔH = ?Use the following information to find ΔH for t...

Solved • Wed Oct 26 2016 13:40:55 GMT-0400 (EDT)

Hess's Law

#### Q. Use the following equations C (s) + O2 (g) → CO2 (g)                                                  ΔH     o = 393.5 kJ H2 (g) + 1/2 O2 (g) → H2O (...

Solved • Wed Aug 24 2016 14:55:55 GMT-0400 (EDT)