1 mole of N_2 gas is mixed with 3 mole of O_2 gas at room temperature to form a mixture at the final pressure of 1 atm, the initial pressure of each being also 1 atm. Calculate the molar entropy of mixing.
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Answer:
total pressure =4atm
nitrogen =25%
Co
2
=40%
oxygen =35%
(portal pressure )O
2
= total pressure ×(mole tractra)O
2
=4×
100
35
=
5
7
=1.40atm
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