Again consider the combustion of ethanol. Compute the standard heat or enthalpy of reaction, for:

$C{H}_{3}C{H}_{2}OH(L)+3O_2(g)2C{O}_2(g)+3H_{2}O(L)$

given that the standard enthalpies of formation are: $-277\mathrm{.}6\mathrm{.}0k\frac{J}{m}ol$ for $C{H}_{3}C{H}_{2}OH(L),-393\mathrm{.}5k\frac{J}{m}ol$ for $C{O}_2(g),$ and $-285\mathrm{.}8k\frac{J}{m}ol$ for $H_{2}O(L).$

$9.(1)$ Hess' Law. P $71-73$

Compute $H^0$ for: $5C(s)+6H_2(g)C_5{H}_{12}(L)$ given:

$C_5{H}_{12}(L)+8O_2(g)5C{O}_2(g)+6H_{2}O(g)$

$H_1^0=3245\mathrm{.}0kJ$

$H_2^0=-394\mathrm{.}0kJ$

$H_3^0=-484\mathrm{.}0kJ$

$2.C(s)+O_2(g)C{O}_2(g)$

$2H_2(g)+O_2(g)2H_{2}O(g)$

$3$