01 Question ( point) See page 293 In some aquatic ecosystems, nitrate (NO,) is c

Question

01 Question ( point) See page 293 In some aquatic ecosystems, nitrate (NO,) is converted to nitrite (NO 1, which then decomposes to nitrogen and water. As an example of this second reaction, consider the decomposition of ammonium nitrite: NH4No,(q)- N2(g)-2H20(1) 1st attempt See Periodic Table See Hint What would be the change in pressure in a sealed 10.0 L vessel due to the formation of N gas when the ammonium nitrite in 1.00L of 1.50 M NHNo, decomposes at 250°C? atm 01/n0> O Type here to search

Explanation / Answer

Answer:

Given equation, NH4NO2(aq)------->N2(g)+2H2O(l)

Temeperature T=25 °C=25+273=298 K, P=?, Volume V=10.0 L, R=8.205x10-2 L atm mol-1 K-1.

And also given 1 L of 1.5 M MH4NO2, so moles of NH4NO2=1.5 mol/Lx1 L=1.5 moles.

From the above equation, moles of NH4NO2=moles of N2=1.5 mol=n

From Ideal gas equation, PV=nRT

P=nRT/V=(1.5 molx8.205x10-2 L atm mol-1 K-1x298 K)/10 L=366.7635 atm

Therefore pressure of N2=366.7635 atm.

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