Fundamentholfundamenthol
JEE Main2019Chemistry
Q.

An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done in kJ is :

  1. A

    –9.0

  2. B

    –0.9

  3. C

    –2.0

  4. D

    +10.0

Solution

w = –PV

= –( 1 bar) × (9 L)

= –(105 Pa) × (9 × 10–3) m3

= –9 × 102 N-m

= –900 J

= –0.9 kJ

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