# What is the coefficient for O_2 when the equation for the combustion of C_5H_12 to CO_2 and H_2O is balanced?

${C}_{5} {H}_{12 \left(l\right)} + 8 {O}_{2 \left(g\right)} \rightarrow 5 C {O}_{2 \left(g\right)} + 6 {H}_{2} {O}_{\left(g\right)}$
Is the equation above balanced? How do you know? Hexanes (${C}_{6} {H}_{14}$) is also a common fuel. How would you represent its combustion? How is energy transferred in the above reaction?