Calculate the value for the heat of formation for pentane given the heat of combustion of pentane is $147\mathrm{.}3$ kJ$/$mol$,$ the heat of formaFon of carbon dioxide is $-393\mathrm{.}5$ kJ$/$mol$,$ and the heat of formaFon of water is $-285\mathrm{.}8$ kJ$/$mol$.$ You may assume this is run at $27\mathrm{.}9\backslash$deg C$.$ What is the coefficient of water in the balanced equation?

What is the coefficient of carbon dioxide in the balanced equation?

What is the $$Hf$$ of pentane for this reaction?