The work done during expansion of a gas in vacuum is zero, because there is

Options

A. No opposing force i.e. P = 0
B. No change in volume i.e.` Delta V = 0`
C. No change in internal energy i.e. `Delta U = 0`
D. No change in temperature i.e. `Delta T = 0`

Answer

A

Explanation

`W-P Delta V.` In vacuum P=0