A chemical reactor operates in steady$-$state at $1$ bar pressure and it is supplied

with $20kg{s}^{-1}$ of steam and $20kg{s}^{-1}$ of carbon monoxide. The flow out of the

chemical reactor consists of a mixture of steam, carbon monoxide, carbon

dioxide and hydrogen that is in thermodynamic equilibrium at $226\mathrm{.}85C$ and $1$

bar.

Steam is supplied by a boiler at $650C$ and $20$ bar and it flows into the chemical

reactor through an adiabatic throttle. Neglect changes in kinetic and gravitational

potential energy.

$($i$)$ State one thermodynamic property that is constant through the throttle and

determine the temperature of the steam entering the chemical reactor.

Why does the temperature of the steam change through the adiabatic

throttle?

$($ii$)$ Calculate the molar fractions of the mixture entering the reactor.

$($iii$)$ Write the chemical equation for the reversible reaction taking place inside

the chemical reactor.

$($iv$)$ Giving your reasons, state whether increasing the temperature of the

chemical reactor will increase or decrease the yield of hydrogen.