InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
10 moles of an ideal gas expand isothermally and reversibly from a pressure of5 atm to 1 atm at300 K . What is the largest mass that can be lefted through a height of 1 metre by this expansion? |
|
Answer» `w_(exp) = - 2.303 nRT log.(P_(1))/(P_(2))= -2.303 ( 10 mol) xx( 8.314 JK^(-1) mol^(-1)) ( 300 K ) log. ( 5)/(1) = - 40.15 xx 10^(3)J` If M is the mass that can be lifted by this work ,through a height of 1metre, then work done `=` Mgh ` 40.15xx 10^(3)J= Mxx9.81 m s^(-2) xx 1m` or ` M =( 40.15 xx10^(3) kg m^(2) s^(-2))/( 9.18 ms^(-2)xx 1 m ) (J = kg m^(2) s^(-2))` `= 4092 .76 kg` |
|