Calculating Work Done on a Gas Under Constant Pressure: 4.0L to 2.0L at 850 Pa

[joeyz123]

Homework Statement

Question: The volume of an ideal gas is compressed from 4.0L to 2.0L under a constant pressure of 850 Pa. How much work is done on the gas?

Homework Equations

W=-P(Change in volume)

The Attempt at a Solution

I keep coming out with -1.7 which I know is incorrect.

 

[Dadface]

1.Don't forget the unit of work.
2.Do you think that the work done on the gas is negative or could it be positive?