Entropy

In terms of entropy and energy, systems in nature tend to undergo changes toward

• lower entropy and lower energy

• lower entropy and higher energy

• higher entropy and lower energy

• higher entropy and higher energy

The amount of randomness of the atoms in a system is an indication of the

• entropy of the system

• polarity of the system

• excited state of atoms

• ground state of atoms

The entropy of a sample of H₂O increases as the sample changes from a

• gas to a liquid

• gas to a solid

• liquid to a gas

• liquid to a solid

Which 1-mole sample has the least entropy?

• Br₂(s) at 266 K

• Br₂() at 266 K

• Br₂() at 332 K

• Br₂(g) at 332 K

As products are formed in the reaction:

NH₄Cl(s) + 3.5 Kcal → NH⁺(aq) + Cl^–(aq)

the entropy of the system

• decreases and heat is absorbed

• decreases and heat is released

• increases and heat is absorbed

• increases and heat is released