An ideal gas expands from 1 0 - 3 m 3 to 1 0 -2 m 3 at 300 K, against a constant pressure of 1 0 5 N m - 2 . The work done on it is

Question

An ideal gas expands from 1 0 - 3 m 3 to 1 0 -2 m 3 at 300 K, against a constant pressure of 1 0 5 N m - 2 . The work done on it is, -0.9 kJ, -9 kJ, -900 kJ, -90 kJ

MARKS App · Accepted Answer

w = − P e x t V 2 − V 1 = − 10 5 Nm − 2 × 10 − 2 m 3 − 10 − 3 m 3 = − 10 5 × 9 × 10 − 3 Nm or J = − 9 × 10 2 J = − 0.9 kJ

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