$5\mathrm{.}4$ Use Hess's law and the fact that going from Santa Fe to

Northfield involves a decrease in altitude of $5300ft$ to determine

the change in altitude in going from Denver to Santa Fe$.$ Express

your answer in the form of a diagram similar to Figure $5\mathrm{.}3.$

$5\mathrm{.}5$ Draw diagrams similar to Figure $5\mathrm{.}4$ for the following

reactions, as written. $($No need to do any calculations here, just

focus on relative ground states.$)$

$($a$),2C(s)+2H_2(g)C_2{H}_4(g),{}_{r}U=227k\frac{J}{m}ol$

$($b$),C(s)+2H_2(g)longrightarrowC{H}_4(g),{}_{r}U=-75k\frac{J}{m}ol$

$($c$),B{r}_2(l)longrightarrowB{r}_2(g),{}_{r}U=28k\frac{J}{m}ol$

$($d$)C_2{H}_{5}OH(l)+3O_2(g)longrightarrow,{}_{r}U=-1367k\frac{J}{m}ol$

$2C{O}_2(g)+3H_{2}O(l)$