Chemistry Practice Problems Hess's Law Practice Problems Solution: Use the standard reaction enthalpies given below t...

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

Solution: 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) → S(s) + O2(g)       ΔH°rxn = +296.8 kJ 2SO2(g) + O2(g) → 2SO3(g)       ΔH°rxn = -197.8 kJ a. -494.6 kJ b. -692.4 kJ c. -791.4 kJ d. -98.8 kJ e. -293.0 kJ

Problem

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) → S(s) + O2(g)       ΔH°rxn = +296.8 kJ 

2SO2(g) + O2(g) → 2SO3(g)       ΔH°rxn = -197.8 kJ 

a. -494.6 kJ 

b. -692.4 kJ 

c. -791.4 kJ 

d. -98.8 kJ 

e. -293.0 kJ

Solution

To find the ΔHrxn, we need to use the Hess's Law where we have to rearrange the given equations to get the desired reaction

Solution BlurView Complete Written Solution