Explain why, alkanes are excellent fuels.

Complete the following equation:

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}\underset{170°\mathrm{C}}{\overset{\mathrm{conc}.{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }}$

Complete the following equation:

${\mathrm{CH}}_3\mathrm{COOH}+{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}\stackrel{\mathrm{conc}.{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }$

Complete and balance the following equation:

${\mathrm{CH}}_4+{\mathrm{O}}_2\to$

Complete and balance the following equation:

${\mathrm{CH}}_4+{\mathrm{Cl}}_2\stackrel{\mathrm{sunlight}}{\to }$