(Solved): 1. Compressed natural gas (CNG) typically contains methane, ethane, propane, butane and pentane in f ...

1. Compressed natural gas $(\mathrm{CNG})$ typically contains methane, ethane, propane, butane and pentane in following composition by volume, $88.5\%,5.5\%,3.7\%,1.8\%$ and $0.5\%$. (a) Find the Lower Flammability Limit (LFL) and Upper Flammability Limit (UFL) of the mixture in air at $25^{?}\mathrm{C}$. (b) Find the Lower Flammability Limit (LFL) and Upper Flammability Limit (UFL) of the mixture in air at $125^{?}\mathrm{C}$ and $1\mathrm{atm}$. (c) Find the Upper Flammability Limit (UFL) of the mixture in air at $125^{?}\mathrm{C}$ and $10\mathrm{atm}$. Data: LFL and UFL for pure components @ $25^{?}\mathrm{C}$ and $1\mathrm{atm}$ is given below, 4. Find boiling point, melting point, Standard Gibb's free energy, $P_c,C_p{}^{?}$ (at $500\mathrm{K}$ and $700\mathrm{K}$ ) and $?{\mathrm{H}}_{\mathrm{m}}$ of hydroxychloroquine using Joback and Constantinou/Gani (both first and second orders) property methods. Estimate its error in melting temperature with reference to actual value. $(5+5=10\mathrm{M})$ 5. For the manufacture of vinyl chloride, assemble a preliminary database. This should include thermophysical property data, MSDSs for each chemical giving toxicity and flammability data, and the current prices of the chemicals. (5 M)