A column for gas chromatography features: length of packing 52 cm; volume flow rate 0.421 mL/min, volume of the analyte in the mobile phase (VM) 1.57 mL, and volume of the analyte in the stationary phase (VS) 0.321 mL. A chromatogram of a mixture of species A, B, C, and D provided the following data:

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a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.

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.