Author Question: Choose the correct statements concerning entropy. I) Following the mixing of two gases, S is ... (Read 60 times)

maegan_martin · **on:** Jul 8, 2021

Question 1

Calculate Δ_rG° for the reaction Cu(s) + H₂O(g) → CuO(s) + H₂(g) at 500 K.

Δ_fH° (kJ/ mol) S° (J/mol K)
Cu(s) 0 33.3
H₂O(g) -241.8 188.7
CuO(s) -155.2 43.5
H₂(g) 0 130.6

◦ 231.8 kJ
◦ -135.4 kJ
◦ -58.6 kJ
◦ 110.6 kJ
◦ 86.74 kJ

Question 2

Choose the correct statements concerning entropy.
I) Following the mixing of two gases, ΔS is positive.
II) Entropy is a thermodynamic property related to the degree of disorder.
III) If the temperature of a gas is decreased, ΔS is positive.
IV) Molecules in the liquid state have higher entropy than the same molecules in the gaseous state.
◦ I and III
◦ I, II, III
◦ I and II
◦ I, II, IV
◦ II and III

jordangronback · **Reply #1 on:** Jul 8, 2021

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