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सूर्य की किरणों से एक खुले हुए `30 "मीटर"^(2)` आयतन वाले कमरे का ताप`17^(@)C` सेक `27^(@)C` हो जात है। कमरेक के अन्दर वायुमण्डलीय दाब `1xx10^(5)` पास्कल ही रहता है। यदि कमरे के अंदरी अणुओं की संख्या गर्म होने से पहले एवं बाद में क्रमशः `n_(i)` व `n_(f)` है तो `n_(f)-n_(t)` का मान होगा:
A. `-2.5xx10^(25)`
B. `-1.61xx10^(23)`
C. `1.38xx10^(23)`
D. `2.5xx10^(25)`

1 Answer

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Correct Answer - a
`n` मोल आदर्श गैस के लिए `PC=nRT`
`:.n_(f)-n_(i)=((PV)/(RT))_(f)=((PV)/(RT))_(i)`
`n_(f)-n_(i)=(PV)/R[1/(T_(f))-1/(T_(i))]`
`=(10^(5)xx30)/8.31 [1/300-1/290]` मोल
`=(10^(5)xx30)/8.31 10/(300xx290)xx6.023xx10^(23)` अणु
`=-2.5xx10^(25)` अणु।

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