Question

Oxygen at 50 lbf/in.², 200 F is in a piston/cylinder arrangement with a volume of 4 ft³. It is now compressed in a polytropic process with exponent, n = 1.2, to a final temperature of 400 F. Calculate the heat transfer for the process.

Answer 1

Continuity: m₂ = m₁ ; Energy: E₂ - E₁ = m(u₂ - u₁) = ₁Q₂ - ₁W₂

State 1: T, P and ideal gas, small change in T,