Question

One mole of an ideal gas at ${25}^o$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 vaccum $(P_{external}=0)$?

• A. $-4.0\times {10}^2$
• B. $-3.0\times {10}^2$
• C. $-1.0\times {10}^2$
• D. Zero

Answer 1

The correct option is D Zero

$\left(D\right)$= zero

whenever the expansion is against vactum

$Pext=0$

So, work done $=-pdv$

$=0(4-1)=0$

zero