Question

1. Phase change: SSolid) < SLiquid) → SGas) 2. SFewer reactant molecule) → S(More product molecules) 3. Temperature change: 1 T 1S 4. Dissolving liquids & solids = f S except for some ionic compounds that form hydrates 5. Mixing gases = | s Predict whether ASº is likely to be positive or negative for each of the reactions. a) 2 CO(g) + O2(g) → 2 CO2(g) S (3molec) > S (2molec); AS < 0 b) 2 NaHCO3(s) → Na,CO3(s) + H2O(l) + CO2(8) c) C,H(g) + Br2(g) → CH,BrCH,Br(1) d) 2 C,H,(g) + 7 02(g) → 4 CO2(g) + 6 H2O(g) (combustion rxn)

Answer 1

Entropy is the measurement of randomness and increases with increasing the disorder.

Order: solid<liquid<gas

A. dS=-ve since no of gaseous moles decreases from Reactant to products.

B. +Ve , since gaseous molecymol of products are formed from solid

C. -ve , since liquid is formed from gas

D. +Ve , since more no of gas molecules