# An ideal gas expands in volume from 10-3 m3 to 10-2 m3 at 300 K against a constant pressure of 105 N m-2 . The work done is: Option 1) 900 kJ Option 2) -900 kJ Option 3) 270 kJ Option 4) -900 J

As we discussed in concept

Work Done for Irreversible Isothermal Expansion of an ideal gas -

- wherein

may be equal to or may not be equal to , but work done is always calculated by

Work done due to change in volume when pressure is constant

=

=

= - 900 J

Option 1)

900 kJ

This option is incorrect.

Option 2)

-900 kJ

This option is incorrect.

Option 3)

270 kJ

This option is incorrect.

Option 4)

-900 J

This option is correct.

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