volume of N2 at STP if 3160 g CH3NO2 burned

volume of N2 at STP if 3160 g CH3NO2 burned

 

 

Nitromethane, a fuel occasionally used in drag racers,

burns according to the reaction:

4CH3NO2(l) + 3O2(g) → 4CO2(g) + 6H2O(g) + 2N2(g)

 

a) What is the volume of nitrogen gas produced at STP

if 3160 g of CH3NO2 is burned?

 

b) What is the mass of nitromethane burned

if 955 g of nitrogen gas are produced

in the exhaust of the drag racer?

 

c) What mass of water vapor is produced

in the exhaust along with 3.5×10^25 molecules of nitrogen gas?

 

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a) What is the volume of nitrogen gas produced at STP

if 3160 g of CH3NO2 is burned?

 

 

 

CH3NO2의 몰질량 = 61.04 g/mol 이므로,

3160 g / (61.04 g/mol) = 51.769 mol CH3NO2

( 참고 https://ywpop.tistory.com/7738 )

 

 

 

CH3NO2 연소 반응식

4CH3NO2 + 3O2 → 4CO2 + 6H2O + 2N2

 

CH3NO2 : N2 = 4 : 2 계수비(= 몰수비) 이므로,

CH3NO2 : N2 = 4 : 2 = 51.769 mol : ? mol

 

? = 2 × 51.769 / 4 = 25.8845 mol N2

 

 

 

STP에서, 기체 1 mol = 22.414 L 이므로,

( 참고 https://ywpop.tistory.com/8321 )

 

25.8845 mol × (22.414 L / 1 mol) = 580.175 L N2

 

 

 

답: 580.2 L

 

 

 

 

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