Question

If 2.5 moles of each of these compounds are burned completely in O2, which will produce the least amount of CO2? C2H5OH CH4 C2H6 C3H8 Choose 1

Answer 1

1)C2H5OH+7/2O2----------->2CO2+3H2O

1moleof C2H5OH=2moles ofCO2

for 2.5moles of C2H5OH=2.5*2=5moles of CO2 is produced

2)CH4+2O2------->CO2+2H2O

1mole of CH4=1mole of CO2

for 2.5 moles of CH4=2.5moles of CO2 is produced

3)C2H6+7/2O2--------->2CO2+3H2O

1mole of C2H6=2moles of CO2

for 2.5 moles of C2H6=2,5*2=5moles of CO2 is produced

4)C3H8+5O2---------------->3CO2+4H2O

1mole of C3H8 = 3moles of CO2

2.5moles of C3H8=2.5*3=7.5moles of CO2 is produced.

CH4 produce least CO2.