Q1) A 2.35 mole sample of an ideal gas, for which Cv,m=12.5JK1mol1, initially a Pa undergoes two-stage transformations. For each of the stages for the following U and H. (6 marks) a) The gas is expanded isothermally and reversibly until the volume triples. b) Beginning at the end of the first stage, the temperature is raised to 105 Q2) What was the main goal of Joule's experiment? Do you accept the conclusi work and why? If your answer is NO what was the major source of error in his Q3) Consider a gas obeys the equation of state: [P+T1/2(V+nb)n2a](Vnb)=nRT Calculate the change in internal energy (U) when 1 mol of the gas is reversit V1 at constant temperature. (Hint: (VU)T=T(TP)VP ) (6 marks) Q4) Suppose that an ideal gas undergoes an irreversible isobaric adiabatic p for q,w,U and H and the final temperature of the gas undergoing the pri Q5) A certain gas obeys the van der Waals equation with a=0.50m6Pamc 5.0104m3mol1 at 273K and 3.0MPa. Calculate the van der Waals const P=VmbRTVm2a