# 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

###### FREE Expert Solution
79% (186 ratings)
###### FREE Expert 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

79% (186 ratings) ###### Problem Details

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

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Hess's Law concept. You can view video lessons to learn Hess's Law. Or if you need more Hess's Law practice, you can also practice Hess's Law practice problems.

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Our tutors rated the difficulty ofUse the standard reaction enthalpies given below to determin...as low difficulty.

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Based on our data, we think this problem is relevant for Professor Marrero's class at LONESTAR.