You have an unknown pure gas. Its volume has been measured to be 1.86 * 10-3 [m3/mol]

Question:

You have an unknown pure gas. Its volume has been measured to be 1.86 * 10-3 [m3/mol] at 15 bar and 100°C and 6.12 * 10–4 [m3/mol] at 40 bar and 100°C. As best you can, calculate the fugacity and fugacity coeffi cient of this gas at 50 bar and 100°C.

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