a storage tank contains 21.6kg of nitrogen (N2) at an absolute pressure of 3.65 atm. What will the pressure be if nitrogen is replaced by an equal mass of CO2?
1 Answer
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moles of N2 = 21600g / 28g/mol = 771 mol
CO2 has weight 12 + 2*16 = 44g/mol,
so moles of CO2 = 21600g / 44g/mol = 491 mol
For temperature constant, the new pressure is
p = 3.65atm * 491/771 = 2.32 atm
