Problem: For each pair of substances, at the same temperature, choose the one with the higher entropy:I. (i) I2(l) (ii) I2(s)II. (i) PCl3(g) (ii) PCl5(g)III. (i) BaI2(aq) (ii) BaI2(s)IV. (i) 2 moles of NO2(g) (ii) 1 mole of N2O4(g)a. (ii) (i) (i) (i)b. (i) (ii) (i) (ii)c. (i) (i) (ii) (i)d. (ii) (ii) (i) (i)e. (i) (ii) (i) (i)

FREE Expert Solution

We’re being asked to predict which has the greatest entropy (ΔS) for the given reactions. Recall that if:

• ΔS > 0 or ΔS = (+); entropy is increased

• ΔS < 0 or ΔS = (–); entropy is decreased


Remember that phase changes lead to a change in entropy:

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Problem Details

For each pair of substances, at the same temperature, choose the one with the higher entropy:

I. (i) I2(l) (ii) I2(s)

II. (i) PCl3(g) (ii) PCl5(g)

III. (i) BaI2(aq) (ii) BaI2(s)

IV. (i) 2 moles of NO2(g) (ii) 1 mole of N2O4(g)

a. (ii) (i) (i) (i)

b. (i) (ii) (i) (ii)

c. (i) (i) (ii) (i)

d. (ii) (ii) (i) (i)

e. (i) (ii) (i) (i)

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

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