Methane at 50 psia and 1008F is compressed in a steady-flow device to 500 psia and 1100oF.

Question:

Methane at 50 psia and 1008F is compressed in a steady-flow device to 500 psia and 1100oF. Calculate the change in the specific entropy of the methane and the specific work required for this compression
(a) Treating the methane as an ideal gas with temperature variable specific heats.
(b) Using the departure charts.