You are a project engineer. You found a 50dm3 storage container in a scrap metal treatment plant. The vessel is marked to explode when the absolute pressure exceeds 3.5 MPa. The company's policy is that no container pressure should exceed half the explosion pressure. You want to use ethane as a surge tank. The maximum amount stored in the container is 0.75 kg and the maximum temperature is 425 K. Is it against the company's policy if you use this container? Use the following methods to calculate and discuss the results [30 points].

(a) ideal gas law

(b) (b) Lee-Kesler equation (c) Second Virial equation

2. . 50dm3 . 3.5MPa . . ethane (surge tank ) . 0.75kg 425K . ? [30]. (a) (b) Lee-Kesler equation (c) Second Virial equation