Author Question: Sodium reacts violently with water according to the equation:2 Na(s) + 2 H2O(l) 2 NaOH(aq) + ... (Read 62 times)

xclash · **on:** Feb 15, 2020

Question 1

Without doing any calculations, determine whether the standard entropy change, ΔS° is positive or negative for each of the following reactions.

reaction 1: S(s, rhombic) + O2(g) → SO2(g)
reaction 2: 2 SO2(g)+ O2(g) → 2 SO3(g)

◦ ΔS° is positive for both reactions.
◦ ΔS° is negative for both reactions.
◦ ΔS° is positive for reaction 2 but negative for reaction 1.
◦ ΔS° is positive for reaction 1 but negative for reaction 2.

Question 2

Sodium reacts violently with water according to the equation:

2 Na(s) + 2 H2O(l) → 2 NaOH(aq) + H2(g)

The resulting solution has a higher temperature than the water prior to the addition of sodium. What are the signs of ΔH° and ΔS° for this reaction?
◦ ΔH° is negative and ΔS° is negative.
◦ ΔH° is positive and ΔS° is positive.
◦ ΔH° is negative and ΔS° is positive.
◦ ΔH° is positive and ΔS° is negative.

akpaschal · **Reply #1 on:** Feb 15, 2020

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