Which process is expected to have an increase in entropy?
a. formation of liquid water from hydrogen and oxygen gas.
b. decomposition of n2o4 gas to no2 gas
c. precipitation of baso4 from mixing solutions of bacl2 and na2so4
d. iron rusting

Option (B) is the correct answer.

Explanation:

Degree of randomness of the molecules of a substance is known as entropy. More is the kinetic energy between the molecules of a substance more will be the degree of randomness.

Therefore, when a substance is present in a gaseous state then it has the maximum entropy. In liquid state, molecules are closer to each other so, there is less randomness between them.

On the other hand, in solid state molecules are much more closer to each other as they arr held by strong intermolecular forces of attraction. Therefore, they have very less entropy.

Since, 1 mole is producing 2 moles. This means that degree of randomness is increasing as both the molecules are present in gaseous form.

Thus, we can conclude that decomposition of gas to gas is the process that is expected to have an increase in entropy.

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.