What is the heat of a system when it expands by 0.67 m^3?

[map7s]

Homework Statement

A system expands by 0.67 m^3 at a constant pressure of 105 kPa. Find the heat of the system if its internal energy decreases by 1710J.

Homework Equations

Since P=constant:
deltaU=Q-W
W=PdeltaV

The Attempt at a Solution

I tried plugging in the numbers to the equation for W and then plugging that value into the first equation to solve for U, but I didn't get the correct answer and I'm not sure where I went wrong.

 

[OlderDan]

Nobody will know where you went wrong if you don't say what you plugged into where and what came out of that process.

 

[map7s]

sorry, but while I was typing my process just now I realized what went wrong. Thank you!