1are koi reply to karo.
NH4Cl(S)(CONTAINED IN A FLASK)=NH3(G)+HCl(G) DELTA H=176 KJ/MOL
HOW IS MASS OF NH4Cl AFFECTED BY-
1.TEMP IS DECREASED
2.NH3 ADDED
3.HCl ADDED
4.NH4Cl ADDED WITH NO CHANGE IN VOLUME
5.LARGE AMOUNT OF NH4Cl IS ADDED DECREASING VOLUME AVAILABLE TO GASES
I THINK THAT
1.DECREASES
2.INCREASES
3.INCREASES
4.NO EFFECT
5.INCREASES
BUT ANSWER GIVEN IN BOOK ARE-
1.INCREASE
2.INCREASE
3.DECREASE
4.NO EFFECT
5.DECREASE
SO MY ANSWERS 1,3,5 ARE WRONG.PLZ HELP WHERE I HAVE DONE THE MISTAKE.
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18 Answers
1in the fourth part the mass of NH4Cl increases as u r adding the mass ...........................................
1357Addition of HCl gas will shift the equilibrium in backward direction
so mass of NH4Cl will increase
1I THINK IT IS A LONG TIME SINCE I POSTED IT AND NO REPLIES YET.
1that was a great help.
so,i only disagree with third answer of the book.
if any one can give correct explanation for third answer please send a post.
1NH4Cl (s) = NH3(g) + HCl (g)
Δ H > 0 --> endothermic reaction.
Δng > 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 Δng < 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
11THIS IS AN ENDOTHERMIC RXT AS GIVEN BY U
SO
SOLVING THE DOUBTS OF U[1]
Here Δng=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
1NOW I WORKED OUT PROBLEM AGAIN.
I THINK THAT 2 AND 5 TH PART OF THE QUESTION I HAVE SOME PROBLEM TO SOLVE.
PLEASE POST THE WORKING OF 2 AND 5 TH PART.
11HEY 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
1i disagree with book in only third ans... addition of HCl.. others are fine enuf :)
1WILL ANYONE REPLY TO THIS OR NOT.PLZ ANSWER IT FAST IT IS A LNG TIME SINCE I POSTED THIS DOUBT.
1ooooooooollllaaaaaaaaaaaaaaaa!!!
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.
1oh dude manipal,
look in ur 1st point u urself mention that reaction go forward on temp. increase.then how mass of N4HCl will increase.
in ur second point u said that to counter effect of hcl added reaction will go backward.all right but y that does not happen when NH3 is added.
106@mani .. le chatelier's principle is about concentration.. concentration of NH4Cl will always be constant...
AND (1) equilibrium will shift forward ==> mass of NH4Cl should increase how?? reactants will get consumed naa?