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Standard XII

Physics

Work Done

One mole of a...

Question

One mole of an ideal gas at $25^{\circ} C$ expands in volume from 1.0 L to 4.0 L at constant temperature. What work (in J) is done if the gas expands against a vacuum $(P_{e x t e r n a l} = 0)$ ?

-4.0 X 10²

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- 3.0 X10²

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4.0 X 10² J

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0 J

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Solution

The correct option is D
0 J

$W = - P (V_{2} - V_{1})$

in vaccum $P_{e x t} = 0$

$W = 0$

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One mole of an ideal gas at 25∘C expands in volume from 1.0 L to 4.0 L at constant temperature. What work (in J) is done if the gas expands against a vacuum (Pexternal = 0)?

The correct option is D 0 J W = −P(V2 − V1) in vaccum Pext = 0 W = 0

One mole of an ideal gas at $25^{\circ} C$ expands in volume from 1.0 L to 4.0 L at constant temperature. What work (in J) is done if the gas expands against a vacuum $(P_{e x t e r n a l} = 0)$ ?

The correct option is D
0 J

$W = - P (V_{2} - V_{1})$

in vaccum $P_{e x t} = 0$

$W = 0$