1. The problem statement, all variables and given/known data Two moles of an monoatomic ideal gas are experiencing an adiabatic transformation; during this time the temperature modifies from [tex]T1=400K[/tex] to [tex]t2=277^o C[/tex]. What's the value of the mechanical work exchanged by the gas with the exterior? 2. Relevant equations The mechanical work's formula, Poisson's equations 3. The attempt at a solution First i wrote this [tex]L=(p_1V_1-p_2V_2)/(g-1)[/tex] Then wrote Poisson's equations, replaced the temperature with the given values, then find out V1 in function of V2 and p1 in function of p2. Replacing them in the first equation would get me a wrong answer (2.6 = 1) I haven't done any thermodynamics exercise for 3 years and i quite forgot the stuff. Sorry for the weird terms i may have used, don't know them exactly in english.