For which of the following would ∆S most likely have a value very close to zero?
1. 2 H2O(ℓ) → 2 H2(g) + O2(g)
2. CO2(g) → CO2(s)
3. KOH(s) + NH4Cl(s) →
NH3(g) + H2O(ℓ) + KCl(aq)
4. CH4(g) + 2 O2(g) →
CO2(g) + 2 H2O(ℓ)
5. CO(g) + NO2(g) →
CO2(g) + NO(g)

How are ionic bonds formed and what is the attractive force within an ionic bond

The answer for #3 is c but i don't know why

Ethanol (c2h5oh) is produced from the fermentation of sucrose in the presence of enzymes. c12h22o11(aq) + h2o(g) 4 c2h5oh(l) + 4 co2(g) determine the theoretical yield and the percent yields of ethanol if 680. g sucrose undergoes fermentation and 326.5 g ethanol is obtained. theoretical _ g _ percent %