Answer to Question #278456 in General Chemistry for Sam

Question

What is the total number of carbon dioxide formed by the complete combustion of 28.0 liters of c2h6

Answer 1

2C4H10 + 13O2 ==> 8CO2 + 10H2O Balanced equation

 

moles C4H10 present = 23.2 g x 1 mole/58.12 g = 0.3992 moles C4H10

At STP 1 mole of gas = 22.4 liters, so ..

0.3992 moles C4H10 x 22.4 L/mole = 8.94 liters of C4H10

 

From the balanced equation, mole ratio of CO2 : C4H10 is 8 : 2 so to find moles or liters of CO2 use this ratio.

 

Liters CO2 = 8.94 liters C4H10 x 8 liters CO2/2 liters C4H10 = 35.8 liters CO2 produced