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JEE Main 201912 AprilMorning Shift

Exam: JEE Main
Year: 2019
Date: 12 April
Shift: Morning Shift
Subject: Chemistry
Chapter: Thermodynamics (C)

JEE Main 2019 · 12 April · Morning Shift · Chemistry · Thermodynamics (C)

An ideal gas is allowed to expand from 1L to 10L against a constant...

An ideal gas is allowed to expand from

1L

to

10L

against a constant external pressure of

1

bar. The work done in

kJ

is:

Options

A $+ 10.0$
B $- 2.0$
C $- 0.9$
D $- 9.0$

Correct answer

C. $- 0.9$

Step-by-step solution

w - {P}_{ext}\left({v}_{2} - {v}_{1}\right)<br />

⇒ - 1

bar \left(10L - 1L\right)<br />

⇒ - 9Lbar ∴ 1Lbar = 100J

<br />

⇒ - 900J

<br />

⇒ - 0.90kJ

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