How do you apply gas stoichiometry?

1 Answer

N2 + 3H2 ---> 2NH3 What volume of hydrogen is necessary to react with five liters of nitrogen to produce ammonia? (Assume constant temperature and pressure.)

N2 + 3H2 ---> 2NH3 , as per this equation, 1 volume of Nitrogen , needs 3 volumes of Hydrogen. The reaction produces two volumes of ammonia.

Let us write this as equation;

1 volume of Nitrogen3 volume of Hydrogen (a)

If we start with 5 L of Nitrogen , X volumes of Hydrogen will be needed.

Let us write this as equation;

5 L of NitrogenX L of Hydrogen (b)

equate (a) and (b)
13 = 5X

cross multiply 1X = 35 , X=15 L

2CO + O2 ---> 2CO2 How many liters of carbon dioxide are produced if 75 liters of carbon monoxide are burned in oxygen? How many liters of oxygen are necessary?

As per this equation, 2 volumes of Carbon Monoxide, needs 1 volume of Oxygen. The reaction produces two volumes of Carbon dioxide.

Let us write this as equation;

2 volume of Carbon Monoxide2 volumes of Carbon Dioxide (a)

If we start with 75 L of Carbon monoxide , X volumes of carbon dioxide will be produced.

Let us write this as equation;

75 L of COX L of CO2 (b)

equate (a) and (b)

22 = 75X

cross multiply 2X = 275 , X= 75 L

2 volume of Carbon Monoxide1 volumes of Oxygen (a)

If we start with 75 L of Carbon Monoxide , X volumes of Oxygen will be needed.

75 L of COX L of O2 (b)

equate (a) and (b)

21= 75X

2X = 751

2X =75

X= 37.5 L