Signature: answer.

a$.$ in a constant$-$volume batch reactor

b$.$ if the reaction is elementary.

c$.$ if the reaction is elementary and in a constant$-$volume batch reactor.

d$.$ always

$(2)$ A semi$-$batch reactor for $R+SP$ starts with $10$ mol $S$ in the reactor. $R$ is added at I mol$/$min$.$ What is the closest plot to Cpvs$.$ time after a long time?

$(3)$ An isothermal batch reactor is used to carry out a $1^{st}-$order reaction. The initial concentration of a reactant was $4\mathrm{.}0mo\frac{l}{L}.$ After $15$min, its concentration was $2\mathrm{.}0mo\frac{l}{L}.$ What is the concentration after $30$ min?

a$.0\mathrm{.}5mo\frac{l}{L}$

b$.1\mathrm{.}0mo\frac{l}{L}$

c$.1\mathrm{.}5mo\frac{l}{L}$

d$.$ None of the above

$(4)$ If the initial rates for a $1^{st}-$order and a $2^{nd}-$order reaction are the same, which will obtain $90\%$ conversion faster in an isothermal batch reactor?

a$.$ Reactor $1$

b$.$ Reactor $2$

c$.$ There is no difference between the two reactors.