chemical equilibrium.

in the fourth part the mass of NH4Cl increases as u r adding the mass ...........................................

so third answer of book is only wrong.am i right sir.

I THINK IT IS A LONG TIME SINCE I POSTED IT AND NO REPLIES YET.

NH₄Cl (s) = NH₃(g) + HCl (g)

Δ H > 0 --> endothermic reaction.

Δn_g > 0

1. TEMPERATURE DECREASES --> moves towards exothermic reaction.
Thus, mass of NH₄Cl increases.

2. NH₃ IS ADDED --> moves in backward direction.
Thus, mass of NH₄Cl increases.

3. HCl IS ADDED --> moves in backward direction.
Thus, mass of NH₄Cl increases.

4.NH₄Cl IS ADDED WITH NO CHANGE IN VOLUME --> Since, it is a solid, it doesn't have any effect on the equilibrium.
Thus, no effect on the mass of NH₄Cl

5. VOLUME IS DECREASED --> moves in the direction, where Δn_g < 0. Moves in backward direction.
Thus, mass of NH₄Cl increases.

According to me, the above answers are correct.
If I'm wrong anywhere, please correct me.
ALL THE BEST

THIS IS AN ENDOTHERMIC RXT AS GIVEN BY U

SO
SOLVING THE DOUBTS OF U[1]

Here Δ_ng=2

1)If temp is decreased the equilibrium will shift forward so as to balance the effect of heat loss(Le Chatlier Principle)

2)If HCl is added so the equilibrium will shift in the backward direction so as to counter the effect of HCl added .

4)If NH₄Cl is added so it is solid and a non reacting in the equilibrium mixture
so there will be no change on the addition of NH₄Cl

HEY CENA LISTEN

WHEN THE TEMPERATURE IS DECREASED
THE REACTION WILL SHIFT IN THE EXOTHERMIC REACTION

AS THE REACTION IS
ENDOTHERMIC
NH₄Cl(S)(CONTAINED IN A FLASK)--------------------->NH₃(G)+HCl(G) +174KJ/moL
<-------------------
EXOTHERMIC

SO THE REACTION WILL TEND TO RESTORE ITS EQUILIBRIUM POSITION

HENCE BACKWARDS

ARE REPLY TO KARO BHAI.

ooooooooollllaaaaaaaaaaaaaaaa!!!

ok now let me give u reasons for my answers,then u may be able to better understand what i wanna say.

1.del.H=+ve,so it shud definitely be decreases.

2.nh3 is added concentrationtration of nh3 increases.
so reaction quotient increases,so reaction shud go backwards,
so ans. shud be increases.

3.same is case of hcl as nh3,so it shud be increase(as given)

4.no effect

5.now,i have to change my 5th answer also,which makes book's 5th ans. also wrong-

as vol. available to gas decrease their concentration increse.thereby increasing reaction quotient.so reaction goes back,so ans. should be increase.