A container having a volume of 40 L contains one of the following fluids at the given initial conditions. After a leak, the temperature and pressure are remeasured. For each option, determine the kilograms of fluid lost due to the leak, using:

(a) Compressibility factor charts

(b) The Peng-Robinson equation

Options:

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(i) Methane T¹ = 300 K, P¹ = 100 bar, T = 300 K, Pf=50 bar (ii) Propane T¹ = 300 K. P¹ = 50 bar, Tf= 300 K, P = 0.9 bar (iii) n-butane T¹ = 300 K. Pi - 50 bar, Tf= 300 K, Pf = 10 bar =