1. The problem statement, all variables and given/known data A cylinder with a heavy ram/piston contains air at T = 300 K. Pi = 2.00 * 105 Pa, Vi = 0.350 m3, Mr = 28.9 g/mol & Cv = 5R/2 (a) What's the Molecular Specific Heat of an Ideal Gas, with a constant volume, computed at J/KgC ? (Cv) (b) What's the mass of the air inside the cylinder? (c) If the piston stands still, how much energy is required for Tf = 700 K? (d) If the piston is free to move, how much energy is required for Tf = 700 K? 2. Relevant equations ΔE = nCvΔT PV = nRT Cv = R + Cp 3. The attempt at a solution (a) No clue what to do here. (b) PiVi = nRTi <=> .... <=> n = 28.065 mol = m/Mr = m/28.9(g/mol) <=> ... <=> m = 0.811 kg (c) ΔE = nCvΔT = 28.065 mol * (5/2 * 8,314 J/molK) * (700 - 300) K <=> ΔE = 233 kJ (d) No clue what to do here either. Any help is appreciated!