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सिथर दाब पर नाइट्रोजन (कमरे के ताप पर ) के ताप में 45K वृध्दि करके के लिए कितनी ऊष्मा की आपूर्ति की जानी चाहिए ? (`N_(2)` का अणुभार = 28: `R = 8.3J mol^(-1) K^(-1)`)|

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नाइट्रोजन का द्रव्यमान `m = 2.0 xx 10^(-2)` किग्रा = 20 ग्राम।
नाइट्रोजन में मोलों की संख्या `mu = (m)/(M) = (20)/(28) = (5)/(7)`.
स्थिर दाब पर नाइट्रोजन (द्वि-परमाणुक गैस) की मोलर ऊष्म `C_(P) = (7)/(2)R`, ताप वृध्दि `DeltaT = 45^(@)C = 45K`
`therefore` आवश्यक ऊष्मा `Q = mu C_(p) DeltaT`
`= (5)/(7) xx (7)/(2)R xx 45 = (5)/(2) xx 8.3 xx 45` जूल
` = 9..375` जूल

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