Grade 11Modern Physics

An electric bulb of volume 250 cm^3 was sealed off during manufacture at a pressure of 10^-3 mm Hg at a 27 degree celsius,find the number of molecules in it.(Avogadro number=6*10^23)

jyothi

12 Years agoGrade 11

2 Answers

Arun Kumar

12 Years ago

$760mm=1atm \\=>10^{-3}mm=10^{-3}/760atm$

$V=.250L$

$T=300K$

Now apply PV=nRT

$R=0.0821 liter�atm/mol�K$

Get n and multiply with Avogadro's Constant.

Arun Kumar

IIT Delhi

Askiitians Faculty

Akshita

7 Years ago

PV=k_B×N×T where we have to find N that is number of molecules. Given V=250 cm3 , P=10^{-3 mm Hg ,}T= 27°C

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An electric bulb of volume 250 cm^3 was sealed off during manufacture at a pressure of 10^-3 mm Hg at a 27 degree celsius,find the number of molecules in it.(Avogadro number=6*10^23)

jyothi

2 Answers

Arun Kumar

Akshita

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