36. Propane (CHs) is a main component of liquefied petroleum gas (LPG). Assume s

Question

36. Propane (CHs) is a main component of liquefied petroleum gas (LPG). Assume standard atmosphere condition, what is the vapor density of the LPG when it is released from a LPG tank? 37. 8.0 m of high purity methane is stored in a gas storage tank in Smith building. The tank has a constant pressure of 2265 psi at 24 (297 "K) in a storage room. On a Tuesday early morning, the air conditioning system in Smith building malfunctioned. The temperature of the storage room reached 40 °C (313 K) and remained at this temperature the whole day. Assume the gas tank is sealed all the time. What is the maximum potential pressure of the methane gas most equal to at the end of that day?

Explanation / Answer

1)using ideal gas equation,

PV=nRT

Or, P/RT=w/M*V

Or,PM/RT=w/V

w/V=mass/volume=density

P=std atmospheric pressure=1atm

T=std atmospheric temperature=273K

Molar mass of propane=44.1g/mol

D=PM/RT=1 atm(44.1g/mol)/(0.0821Latm/Kmol)*273K=1.967g/L=1.967mg/ml=0.00197g/ml

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