A quantity of 4.0 moles of an ideal gas at 20^(@)C expands isothermally against a constant pressure of 2.0 atm from 1.0 L to 10.0L. What is the entropy change of the system (in cals)?

A quantity of 4.0 moles of an ideal gas at 20^(@)C expands isothermall

1.	A quantity of 4.0 moles of an ideal gas at 20^(@)C expands isothermally against a constant pressure of 2.0 atm from 1.0 L to 10.0L. What is the entropy change of the system (in cals)?
Answer» <html><body><p><br/></p>Solution :Expansion against constant pressure means the process is <a href="https://interviewquestions.tuteehub.com/tag/irreversible-519610" style="font-weight:bold;" target="_blank" title="Click to know more about IRREVERSIBLE">IRREVERSIBLE</a> <br/> `Delta S = nR l <a href="https://interviewquestions.tuteehub.com/tag/n-568463" style="font-weight:bold;" target="_blank" title="Click to know more about N">N</a> (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>)) = 4 xx 2 l n (10)/(1) = 18.424` <a href="https://interviewquestions.tuteehub.com/tag/cal-412083" style="font-weight:bold;" target="_blank" title="Click to know more about CAL">CAL</a></body></html>