The Reaction, , Where En Represents Ethylenediamine, Has a Small $\Delta$

question 30

Multiple Choice

The reaction, , where en represents ethylenediamine, has a small value for the enthalpy change, $\Delta$ H_rxn, yet the free-energy change is large because

• A)the reaction rate is fast.
• B)the entropy change is large and positive.
• C)the enthalpy change is large enough to matter.
• D)the entropy change is large and negative.
• E)ethylenediamine has amino groups that are stronger bases than ammonia.

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Definitions:

Acetylcholine

A neurotransmitter in both the peripheral and central nervous system that plays a key role in muscle activation and various cognitive functions.

Excitation-Contraction

A biological mechanism that describes the process of muscle fiber contraction triggered by electrical impulses.

T Tubules

Tube-like structures in muscle cells that play a role in transmitting electrical impulses from the cell surface to the interior, triggering muscle contraction.

Sarcolemma

The fine transparent tubular sheath which envelops the fibers of skeletal muscles.