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5 mole of an ideal gas expands isotherma...

5 mole of an ideal gas expands isothermally and irreversibly from a pressure of 10 atm to 1 atm against a contant external pressure of 1 atm. `W_("irr")` at 300K is:

A

`-15.921kJ`

B

`-11.224kJ`

C

`-110.83kJ`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
`W_("irr") = - P_("ext") (Delta V) = -1 xx ((nRT)/(P_(2)) - (nRT)/(P_(1)))`
`= -1 xx (5 xx 0.0821 xx 300) ((1)/(1) - (1)/(10))`
`= -110.835` L-atm = 11.22 kJ
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