Please explain your reasoning. A) Predict the signs (–, +, or 0) of ΔH and ΔS, in that order, for the reaction: O2(g) → 2O(g)
B) Predict the signs (–, +, or 0) of ΔH and ΔS, in that order, for the expansion of an ideal gas into a vacuum

answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.