1. The problem statement, all variables and given/known data Assume 1.500 mol of a monatomic ideal gas is compressed from 3.00 L to 1.00 L. a. If the initial and final temperature is 10.0 °C, what are the initial and final pressures (in atm)? b. How much work input (in kJ) is required if a reversible isothermal path at 10.0 °C is followed? c. How much work input (in kJ) is required if the compression is adiabatic rather than isothermal? Assume the initial temperature is 10.0 °C. 2. Relevant equations PV=nRT w=-nRTln(vf/vi) U=q+w 3. The attempt at a solution I got both a and b using the first two equations I listed. I got the inital pressure to be 11.6 atm and the final pressure to be 34.8 atm. For the second part I got the work to be 3.88 kJ. I'm stuck on the third part. I know adiabatic means that there no change in U, so q=-w but I don't know how that applies to the question.