InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
32. Two liters of N, at O'C and 5atm areexpanded exothermally against a constantexternal pressure of latm untill the pressureof gas reaches latm. Assuring gas to beideal. Calculate work of expansion1) 400 J 2) -810 J 3) -810 KJ 4) 600 KJplease answer me it's urgent |
| Answer» <html><body><p><<a href="https://interviewquestions.tuteehub.com/tag/p-588962" style="font-weight:bold;" target="_blank" title="Click to know more about P">P</a>><strong><a href="https://interviewquestions.tuteehub.com/tag/explanation-455162" style="font-weight:bold;" target="_blank" title="Click to know more about EXPLANATION">EXPLANATION</a>:</strong></p><p>Since the external pressure is greatly different from the pressure of </p><p>N </p><p>2</p><p> </p><p> and thus, the <a href="https://interviewquestions.tuteehub.com/tag/process-11618" style="font-weight:bold;" target="_blank" title="Click to know more about PROCESS">PROCESS</a> is irreversible.</p><p>w=−P </p><p>ext</p><p> </p><p> (V </p><p>2</p><p> </p><p> −V </p><p>1</p><p> </p><p> )</p><p>w=−1×(V </p><p>2</p><p> </p><p> −V </p><p>1</p><p> </p><p> )</p><p>Given V </p><p>1</p><p> </p><p> =2 litre V </p><p>2</p><p> </p><p> =? T=273K</p><p>P </p><p>1</p><p> </p><p> =5atm P </p><p>2</p><p> </p><p> =1atm</p><p>∴P </p><p>1</p><p> </p><p> V </p><p>1</p><p> </p><p> =P </p><p>2</p><p> </p><p> V </p><p>2</p><p> </p><p> </p><p>∴V </p><p>2</p><p> </p><p> = </p><p>1</p><p>2×5</p><p> </p><p> =<a href="https://interviewquestions.tuteehub.com/tag/10-261113" style="font-weight:bold;" target="_blank" title="Click to know more about 10">10</a> litre</p><p>∴w=−1×(10−2)=−8 litre atm</p><p>∴=− </p><p>0.0821</p><p>8×1.987</p><p> </p><p> calorie=− </p><p>0.0821</p><p>8×1.987×4.184</p><p> </p><p> J=−810.10 <a href="https://interviewquestions.tuteehub.com/tag/joule-526299" style="font-weight:bold;" target="_blank" title="Click to know more about JOULE">JOULE</a></p></body></html> | |