The molar entropy of $I_2(s)$ at $298\mathrm{.}15K$ and $1$atm is $116\mathrm{.}1J{K}^{-1}mo{l}^{-1}.$ Calculate the molar

entropy of $I_2(l)$ at $400\mathrm{.}0K$ and $1$atm

$[8$ marks$]$

$T_{\text{f}\text{u}\text{s}}=386\mathrm{.}75K$

${}_{\text{f}\text{u}\text{s}\text{H}}=15\mathrm{.}518kJmo{l}^{-1}$

$(40\mathrm{.}13+4\mathrm{.}979x{10}^{-2}T)J{K}^{-1}mo{l}^{-1}$

$80\mathrm{.}3J{K}^{-1}mo{l}^{-1}$

Cp$,$m $($s$)$

Cp$,$m $(1)$

$80\mathrm{.}3J{K}^{-1}mo{l}^{-1}$

A heat engine is operating between two fronts of temperatures $260$ and $38C$ and

receiving from the warm front $1055kJ$ of energy. Determine:

$($i$)$ The value of $q_C$

$($ii$)$ The entropy change of the warm front.

$($iii$)$ The entropy change of the cold front.

$[8$ marks$]$

Using ${}_f{H}^{}$ and $S_m^{}$ data, calculate the maximum non$-$expansion work at $298K$

that may be obtained from the reaction below.

$CO(g)+H_{2}O(l)C{O}_2(g)+H_2(g)$

$[5$ marks$]$

The decomposition of $A$ to produce $B$ can be written as $AB.$

a$.$ When the initial $[$A$]$ is $0\mathrm{.}012M,$ the rate is $0\mathrm{.}0018Mmi{n}^{-1}$ and when the

initial $[$A$]$ is $0\mathrm{.}024M,$ the rate is $0\mathrm{.}0036Mmi{n}^{-1}.$

Write the rate law for the reaction.

b$.$ If the activation energy for the reaction is $268kJmo{l}^{-1}$ and the rate

constant at $600K$ is $8\mathrm{.}1{10}^{-3}se{c}^{-1}$ what will be the rate constant at $690K?$

$[6$ marks$]$

Milk is pasteurized if it is heated to $63C$ for $30$min, but if is heated to $74C$ it

only needs $15s$ for the same result. Find the activation energy of this sterilization

process.

$[4$ marks$]$

Nitrogen monoxide, is believed to react with chlorine according to the following

mechanism:

$NO+C{l}_2{}_{k_{-1}}^{k_1}NOC{l}_2$

$NOC{l}_2+NO{k}_2$NOCl

Apply steady state approximation to obtain the rate law.