Question

In: Chemistry

If the decomposition of 45.987g ammonium nitrate is carried out at 18.0 degrees C and 786.3...

If the decomposition of 45.987g ammonium nitrate is carried out at 18.0 degrees C and 786.3 mmHg, what volume of dinitrogen monoxide gas will form? The other product of the reaction is gaseous water. What volume of water will form during this reaction?

Solutions

Expert Solution

NH4NO3(s) .............> N2O(g) + 2H2O(g)

From the above balanced equation

1mole of NH4NO3 can produce 1 mole of dinitrogen monoxide and 2moles of H2O

Given 45.987 gm. of NH4NO3

no. of moles of NH4NO3 = (wt/mol.wt) = 45.987/80.043 = 0.574 moles

1 mole of NH4NO3 can produce 1 mole of N2O

then 0.574moles of NH4NO3 can produce ,....................?

   = 0.574 moles of N2O

P = 786.3 mmHg = 1.034 atm.

T = 18 +273 = 291K

n = 0.574 mole

V = ?

According to PV = nRT

R (is gas constant) = 0.0821 lit*atm*mol^-1 K^-1

V = 0.574*0.0821*291/1.034

V = 13.3 lit.

volume of N2O = 13.3 lt

2)

1 mole of NH4NO3 can produce 2 mole of H2O

then 0.574moles of NH4NO3 can produce ,....................?

    = 2*0.574 = 1.15 moles

P = 786.3 mmHg = 1.034 atm.

T = 18 +273 = 291K

n = 1.15 mole

V = ?

According to PV = nRT

V = 1.15*0.0821*291/1.15 = 23.9 lt

volume of gaseous water = 23.9 lit. or 24 lt.


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