A gas expands against a variable pressure given by P = (20)/(V) (where P in atm and V in L). During expansion from volume of 1 litre to 10 litre, the gas undergoes a change in internal energy of 400 J. How much heat is absorbed by the gas during expansion?

A gas expands against a variable pressure given by P = (20)/(V) (where

1.	A gas expands against a variable pressure given by P = (20)/(V) (where P in atm and V in L). During expansion from volume of 1 litre to 10 litre, the gas undergoes a change in internal energy of 400 J. How much heat is absorbed by the gas during expansion?
Answer» <html><body><p>46 J<br/>4660 J<br/>5065.8 J<br/>4260 J</p>Solution :`intdw=int-P.<a href="https://interviewquestions.tuteehub.com/tag/dv-433533" style="font-weight:bold;" target="_blank" title="Click to know more about DV">DV</a>`<br/> `"<a href="https://interviewquestions.tuteehub.com/tag/implies-1037962" style="font-weight:bold;" target="_blank" title="Click to know more about IMPLIES">IMPLIES</a>"w=-int20.(dV)/(V)=-20ln.(V_(2))/(V_(<a href="https://interviewquestions.tuteehub.com/tag/1-256655" style="font-weight:bold;" target="_blank" title="Click to know more about 1">1</a>))`<br/> `w=-46.06 " L-atm"=-4665.8 J`<br/> `DeltaU=q+wimplies400=q-4665.8`<br/>`q = 5065.8 J`</body></html>