4 mL of gas in a piston (syringe) at 10oC and 0.75 atm is heated and expanded to 85oC and 8 mL. What is the pressure of the gas after the expansion?
Since the number of moles is constant,
PV/T = constant
(The ideal gas law tells you that). Therefore
0.75*4.0/283 = P2*8.0/358
Note that the temperatures are absolute ande in oK.
You can use any units you want for P and V, as long as they are the same on both sides of the equation. I chose atm and mL.
Solve for final pressure P2.