Question

Three moles of an ideal gas expanded spontaneously into vacuum. The work done will be :

Answer 1

HELLO THERE!

Whatever be the number of moles expanded,

if it's expanded in vacuum, then we call it Free expansion, and work done is always ZERO.

Reason:

In vacuum, the external pressure is zero. Hence, we know that work done in case of expansion = - PΔV.

Since P = 0, we get work done to be 0.

Thanks!

Answer 2

Answer:

The correct option is : (d) zero

Explanation:

Since the ideal gas expands spontaneously into vacuum, Pext = 0, hence work done is also zero.