The balanced equation for N2 and aluminum is given by-
2Al (s) + N2 (g) = 2AlN (s)
From the above equation it is very clear that 2 mol Al reacts with 1 mol N2 for complete conversion to the product.
now, 2 mol Al = 1 mol N2 gas
moles for Al = w/M = 22.3 / 27 = 0.82 mol
[let us say molar mass for Al = 27]
2 mol Al = 1 mol N2 gas
or, 1 mol Al = 1/2 mol N2 gas
or, 0.82 mol of Al = 0.82 / 2 = 0.41 mol of N2 gas
We know that PV=nRT
Here, P = 825 torr = 825 / 760 atm = 1.085 atm, temperature (T) = 89+273 = 362 K
universal gas constant (R) = 0.082 Lit atm, n = 0.41
So, volume of N2 gas (V) = nRT/P = (0.41*0.082*362) / 1.085 = 11.21 Lit.
Therefore, 11.21 liter N2 gas will berequired.
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