For the following chemical reactions predict the sign ofS fo

For the following chemical reactions, predict the sign ofS for the system. (note that this should not require anydetailed calculations).

a) Fe(s) + 2 HCl (l) --> FeCl₂ (s) +H₂ (g)

b) 3 NO₂ (g) + H₂O(l) -->2HNO₃ (l) + NO(g)

c) 2K(s) + Cl₂ (g) --> 2KCl(s)

d) Cl₂ (g) + 2NO(g) --> 2NOCl(g)

e) SiCl₄ (g) --> Si(s) +2Cl₂(g)

b) negative

c) negative

d) negative

e) positive

Two helpful rules:   S will bepositive if the substances ever become less dense(i.e from solid togas) and it will be negative if they are more dense(gas tosolid)

S will increase ifthe # of moles increases and it will decrease if the # of molesdecreases