Question

E>0 gives what sort of reaction? E<0 gives what sort of reaction?

A) Spontaneous, non-spontaneous
B) Non-spontaneous, spontaneous
C) Reducing, oxidizing
D) Oxidizing, reducing

Answer 1

In electricity and chemistry, a positive cell potential (E>0) indicates a spontaneous reaction, while a negative cell potential (E<0) indicates a non-spontaneous reaction. These reactions are associated with redox processes and depend on the relative strength of oxidants and reductants.

Step-by-step explanation:

The question is asking to determine the type of reaction based on the cell potential sign (E). When E>0, the reaction is spontaneous, meaning that it tends to occur without needing an external input of energy. On the other hand, if E<0, the reaction is considered non-spontaneous, suggesting that it does not naturally proceed under standard conditions without external energy. This concept is tied to redox reactions (oxidation-reduction reactions) where cell potential comes into play.

Relating to other types of reactions:
A. Cellular respiration is an example of an exergonic reaction, as it releases energy.
B. Photosynthesis is endergonic, as it requires energy input.
C. Catabolic reactions are typically exergonic since they break down molecules and release energy.
D. Anabolic reactions are endergonic as they build up complex molecules from simpler ones, requiring energy.