Change in internal energy and heat for isobaric expansion of ideal gas

[jesuslovesu]

I have a Pressure vs Volume Graph and A -> B.
It's just an isobaric expansion, the work done by the gas is -3600 J.
The gas is monatomic ideal (2.0moles).
If I used it correctly, PV=nRT, I found the change in temperature to be 216.6K.

My question is: How do I find the change in internal energy and heat? I don't have any info about the gas except that it's ideal and 2.0 moles worth.

 

[Chi Meson]

Use the equation for the amount of heat required to change the temperature of that gas (at constant pressure). You will have W and Q, then find delta U using the First Law.