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Ajay Sabarish

 Discussion of 'A problem from thermod…

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Ajay Sabarish
Apr 30, 2016 04:39
thank you very much sir,i have my exams in a few weeks and this is really helpful
Ajay Sabarish
Apr 30, 2016 01:32
@Brian can we do the same thing to pressure as well?i.e. if initially total pressure(i.e. pressure of reactant) is p, and in equilbrium partial pressure of reactant has decreased by y,then can we say partial pressure of product is 2y,since 1 mole of reactant will give 2 moles of product.and is x=y?i.e. is decrease in pressure of reactant equal to decrease number of moles of reactant(or number of moles reacted)?
Ajay Sabarish
Apr 30, 2016 01:30
@Brian sorry for the unclear formatting but what i wanted to say is,if initially a moles of gas were there and in equilbrium say x have reacted,then 2x(in this case) moles of product would have been formed,since 1 mole of reactant gives 2 moles of products.
Ajay Sabarish
Apr 29, 2016 11:11
say we have a reaction N2O4 ---\ 2NO2
\----

for this reaction,if initial number of moles of N2O4 is 'a' can we write

t = 0 a -
at equilbrium a-x 2x

similarly can we do the same for pressure i.e.
if initial pressure is p,then can we say

t=0 p -
at equilbrium p-y 2y

if yes why? and is x=y,i.e is the number of moles x dissociated equal to decrease in pressure of reactant?
and is this method valid for all reversible reaction irrespective of the stoichiometric coefficient of reactants and products
Ajay Sabarish
Apr 29, 2016 11:11
sir i have a major doubt in chemical equilbrium can you please clear it?
Ajay Sabarish
Apr 28, 2016 14:07
if it is not a phase change,then will the internal energy be dependent only on temperature atleast in high school themrodynamics?
Ajay Sabarish
Apr 28, 2016 14:06
yes sir iam somewhat able to understand it,water molecules in ice are more closely packed because they have lost some internal energy right? one thing that is clear is,this is somewhat high level,so i prefer remembering it as a fact "in phase change internal energy of the molecule decreases even if the temperature is constant"