The following gas-phase reaction is carried out in a pfr operating isothermally at 650 k and a constant pressure of 3 atm.
a -> 2b, ra = -kca where k = 4.08*10^9[s-1]*e^(-27000[cal/mol]/r t)
the feed consists of a mixture of a and an inert that is twice the molar flowrate of a.
there is a disruption in the upstream process and the inlet molar flowrate of a is now reduced by a factor of 2 (i. e. fa0, new = 0.5 fa0), but the flowrate of inert (fi0,new = fi0) remains constant. you must keep the conversion of a in the reactor at 90%. you cannot change the pressure or the reactor volume so you decide to change the temperature.
a) what temperature do you recommend to maintain a constant conversion of a?
b) qualitatively explain your answer to part (a). in other words, why should the temperature be reduced or raised to maintain x = 0.9?
metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and conduct electricity easily while making metal as good conductor.
the correct answer is a. the ability of electrons to flow throughout the metal.
if it's not useful, feel free to report for mistake in answer.