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Question Number 47314 by rahul 19 last updated on 08/Nov/18

During random motion, gas molecules  do not interact with each other .  Hence  Potential energy =0 ......  Pls explain why P.E = 0?  P.E is stored form of energy,right?

$${During}\:{random}\:{motion},\:{gas}\:{molecules} \\ $$$${do}\:{not}\:{interact}\:{with}\:{each}\:{other}\:. \\ $$$${Hence}\:\:{Potential}\:{energy}\:=\mathrm{0}\:...... \\ $$$${Pls}\:{explain}\:{why}\:{P}.{E}\:=\:\mathrm{0}? \\ $$$${P}.{E}\:{is}\:{stored}\:{form}\:{of}\:{energy},{right}? \\ $$

Commented by rahul 19 last updated on 08/Nov/18

this is one of the  postulate of K.T.G..

$${this}\:{is}\:{one}\:{of}\:{the}\:\:{postulate}\:{of}\:{K}.{T}.{G}.. \\ $$

Answered by ajfour last updated on 08/Nov/18

distance between molecules is  large , P is less and/or temperature  high,molecules neutral, potential   energy therefore negligible  compared to kinetic energy.

$${distance}\:{between}\:{molecules}\:{is} \\ $$$${large}\:,\:{P}\:{is}\:{less}\:{and}/{or}\:{temperature} \\ $$$${high},{molecules}\:{neutral},\:{potential}\: \\ $$$${energy}\:{therefore}\:{negligible} \\ $$$${compared}\:{to}\:{kinetic}\:{energy}. \\ $$

Commented by rahul 19 last updated on 08/Nov/18

Sir, what′s diff. between  gas molecules interact with each other.  & gas molecules collide with each other.

$${Sir},\:{what}'{s}\:{diff}.\:{between} \\ $$$${gas}\:{molecules}\:{interact}\:{with}\:{each}\:{other}. \\ $$$$\&\:{gas}\:{molecules}\:{collide}\:{with}\:{each}\:{other}. \\ $$

Commented by ajfour last updated on 08/Nov/18

during collision, this is even at  some distance (when charged bodies  concerned), potential energy rises  considerably but after collision  returns back to neligible value  for ideal gas atoms. So as far as  electrostatic interaction is   concerned, this takes place only  during non-contact collisions;  contact collisions may result in  a chemical reaction.

$${during}\:{collision},\:{this}\:{is}\:{even}\:{at} \\ $$$${some}\:{distance}\:\left({when}\:{charged}\:{bodies}\right. \\ $$$$\left.{concerned}\right),\:{potential}\:{energy}\:{rises} \\ $$$${considerably}\:{but}\:{after}\:{collision} \\ $$$${returns}\:{back}\:{to}\:{neligible}\:{value} \\ $$$${for}\:{ideal}\:{gas}\:{atoms}.\:{So}\:{as}\:{far}\:{as} \\ $$$${electrostatic}\:{interaction}\:{is}\: \\ $$$${concerned},\:{this}\:{takes}\:{place}\:{only} \\ $$$${during}\:{non}-{contact}\:{collisions}; \\ $$$${contact}\:{collisions}\:{may}\:{result}\:{in} \\ $$$${a}\:{chemical}\:{reaction}. \\ $$

Commented by rahul 19 last updated on 08/Nov/18

thanks sir ����

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