Complete the following combustion reactions:
$1$. Complete oxidation of methane
$2$. Complete oxidation of butane

(N/A) The complete combustion (oxidation) of alkanes produces carbon dioxide and water.
$1$. For methane $(CH_4)$:
$CH_{4(g)} + 2O_{2(g)} \rightarrow CO_{2(g)} + 2H_2O_{(l)}$
$\Delta_{c}H^{\ominus} = -890 \ kJ \ mol^{-1}$
$2$. For butane $(C_4H_{10})$:
$C_4H_{10(g)} + \frac{13}{2}O_{2(g)} \rightarrow 4CO_{2(g)} + 5H_2O_{(l)}$
$\Delta_{c}H^{\ominus} = -2875.84 \ kJ \ mol^{-1}$