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A sealed 89,98-m3 tank is filled with 5 265 moles of oxygen gas (O2) at an...

A sealed 89,98-m3 tank is filled with 5 265 moles of oxygen gas (O2) at an initial temperature of 293,38 K. The gas is heated to a final temperature of 397,1 K. The ATOMIC mass of oxygen is 16.0 g/mol, and the ideal gas constant is R = 8.314 J/mol · K = 0.0821 L · atm/mol · K. Calculate the initial pressure (MPa) of the gas.  Answer in two decimal places.

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Ans: Given V = 89.98 m3, n = 5265 moles, T1 = 293.38 K, T2 = 397.1 K => = 103.72 K

  mO = 16 g/mol, R = 8.314 J/mol-K = 0.0821 L-atm/mol-K

By Ideal Gas Equation,

Therefore initial pressure is 0.14 MPa

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