Consider the combustion of ethane gas, C2H6. In the balanced chemical equation, what are the lowest, whole number coefficients? Match the number to the species.

2C2H6 + 7O2 —> 4CO2 + 6H20

The coefficients are 2, 7, 4, 6

Explanation:

Ethane undergoes Combustion to produce CO2 and H20 as shown by the equation below:

C2H6 + O2 —> CO2 + H20

The equation above is not balance. To balance the equation, do the following:

There are 2 atoms of C on the left side of the equation and 1atom on the right. It can be balance by putting 2 in front of CO2 as illustrated below:

C2H6 + O2 —> 2CO2 + H20

There are 6 atoms of H on the left side and 2 atoms on the right side. It can be balance by putting 3 in front of H2O as illustrated below:

C2H6 + O2 —> 2CO2 + 3H20

Now, there are a total of 7atoms of O on the right side and 2 atoms on the left. It can be balance by putting 7/2 in front of O2 as shown below:

C2H6 + 7/2O2 —> 2CO2 + 3H20

Multiply through by 2 to clear the fraction as shown below:

2C2H6 + 7O2 —> 4CO2 + 6H20

Now the equation is balanced.

The coefficients are 2, 7, 4, 6

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.