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# Problem: Calculate ΔS°rxn for the following reaction:4Cr(s) + 3O2(g) → 2Cr2O3(s).Substance            ΔS°, J/K·molCr(s)                        23.77O2(g)                       205.138Cr2O3(s)                  81.2a. 548.1 J/Kb. 147.7 J/Kc. -147.7 J/Kd. -548.1 J/K

92% (1 ratings)
92% (1 ratings)
###### Problem Details

Calculate ΔS°rxn for the following reaction:

4Cr(s) + 3O2(g) → 2Cr2O3(s).

Substance            ΔS°, J/K·mol

Cr(s)                        23.77

O2(g)                       205.138

Cr2O3(s)                  81.2

a. 548.1 J/K

b. 147.7 J/K

c. -147.7 J/K

d. -548.1 J/K

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 Entropy concept. You can view video lessons to learn Entropy. Or if you need more Entropy practice, you can also practice Entropy practice problems.

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Our tutors rated the difficulty ofCalculate ΔS°rxn for the following reaction:4Cr(s) + 3O2(g) ...as medium difficulty.

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Our expert Chemistry tutor, Dasha took 3 minutes and 6 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Dumont's class at McMaster University.