Chemistry Practice Problems Hess's Law Practice Problems Solution: Consider these reactions, where M represents a gen...

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

# Solution: Consider these reactions, where M represents a generic metal1. 2M(s) + 6HCl(aq) → 2MCl3(aq) + 3H2(g) ΔH1 = -749.0 KJ2. HCl(g) → HCl(aq) ΔH2 = -74.8 KJ3. H2(g)+Cl2(g) → 2HCl(g) ΔH3 = -1845.0 KJ4. MCl3(s) → MCl3(aq) ΔH4 = -298.0 KJUse the information above to determine the enthalpy of the following reaction.2M(s) + 3Cl2(g) → 2MCl3(s) ΔH =

###### Problem

Consider these reactions, where M represents a generic metal

1. 2M(s) + 6HCl(aq) → 2MCl3(aq) + 3H2(g) ΔH= -749.0 KJ

2. HCl(g) → HCl(aq) ΔH2 = -74.8 KJ

3. H2(g)+Cl2(g) → 2HCl(g) ΔH= -1845.0 KJ

4. MCl3(s) → MCl3(aq) ΔH= -298.0 KJ

Use the information above to determine the enthalpy of the following reaction.

2M(s) + 3Cl2(g) → 2MCl3(s) ΔH =

Hess's Law

Hess's Law

#### Q. Using Hess' Law, calculate the enthalpy of formation for C 3H8(g) using the following thermodynamic data.C(s) + O2(g) → CO2(g) ΔH = -393.5 kj/molH2(g)...

Solved • Wed Apr 04 2018 10:21:17 GMT-0400 (EDT)

Hess's Law

#### Q. Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction: 2S(s) + 3O2(g) → 2SO3(g)     ΔH°rxn = ? Given: SO2(g)...

Solved • Mon Apr 02 2018 11:54:20 GMT-0400 (EDT)

Hess's Law

#### Q. Calculate ΔHrxn for the following reaction: Express the enthalpy in kilojoules to one decimal place.CH4(g) + 4Cl2(g) → CCl4(g) + 4HCl(g)given these re...

Solved • Fri Mar 30 2018 11:59:03 GMT-0400 (EDT)

Hess's Law

#### Q. Calculate ΔHrxn for the reaction CaO(s) + CO2(g) → CaCO3(s) given these reactions and their ΔH values: Express the enthalpy in kilojoules to one decim...

Solved • Fri Mar 30 2018 11:56:05 GMT-0400 (EDT)