Question

5 mole of an ideal gas expand isothermally and irreversibly from a pressure of 10 atm to 1 atm against a constant external pressure of 1 atm. `w_(irr)` at 300 K is :
A. `-15.921 kJ`
B. `-11.224 kJ`
C. `-110.83 kJ`
D. None of these

Answer 1

Correct Answer - B
`int dw=-intP_("ext").dV`
`therefore" "w_("irr")=-P_("ext")[(nRT)/(P_(2))-(nRT)/(P_(1))]`
`w_("irr")=-1xx(5xx8.314xx300)xx[1-(1)/(10)]`
`w_("irr")=-11.224 " kJ"`