Question

Which of the following are not state functions?
I. $\Delta S$
II. $q$
III. $W$
IV. $H-TS$

• A. I, II, III
• B. II and III
• C. I and IV
• D. II, III, IV

Answer 1

Answer: (B)

State function or state variables are those which depend only on the state of the system and not on how the state was reached
$H-TS=G\}$ (free energy)
$\Delta S\}$ State function
$w\to$ work done, $q\to$ amount of heat
$w$ and $q$ does not depend upon the state of the system