HI(g) Has a ΔGf° That Is Small and Positive, So

question 59

Multiple Choice

HI(g) has a ΔGf° that is small and positive, so HI should dissociate to some extent but its activation energy is high. HI(g) is stable at room temperature. Chemists would describe the reason for the very slow dissociation reaction as:

• A) thermodynamically controlled
• B) the ΔGf° is wrong
• C) the reaction is not slow
• D) the reaction is kinetically controlled
• E) the molecules can collide with each other

---

Definitions:

CS-UCS Interval

The time gap between the presentation of the conditioned stimulus (CS) and the unconditioned stimulus (UCS) in classical conditioning, crucial for the association strength.

Avoidance Learning

A type of learning whereby an individual learns a behavior to avoid an unpleasant or harmful stimulus.

Extinction

The process through which a previously learned behavior diminishes in frequency or intensity when the reinforcement is no longer presented.

Omission Training

A schedule of reinforcement in which the absence of response leads to reinforcement.