With Respect to the System Only, a Reaction With $\Delta$ H > 0 And

question 56

Multiple Choice

With respect to the system only, a reaction with $\Delta$ H > 0 and $\Delta$ S < 0 is predicted to be:

• A) Spontaneous at all temperatures
• B) Spontaneous at high temperatures only
• C) Spontaneous at low temperatures only
• D) Nonspontaneous at all temperatures

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Definitions:

Secretion

The process by which substances are produced and discharged from a cell or gland.

Atrial Natriuretic Peptide

A hormone secreted by the heart's atria that regulates blood pressure by decreasing sodium ion concentration and therefore reducing blood volume.

Osmoconformer

An animal in which the salt concentration of body fluids varies along with changes in the surrounding sea water so that it stays in osmotic equilibrium with its surroundings.

Osmoregulator

An organism that regulates its internal osmotic pressure, maintaining fluid and electrolyte balance despite external conditions.