In interstellar space near a star there is a region called h ii in which highly excited h atoms can be produced in the process e- + h+ = h (highly excited). when a highly excited hydrogen atom makes a transition from n = 109 to n = 108 a photon is emitted. calculate (i) the wavenumber, in cm-1 and wavelength, in nm, of this radiation. (ii) the frequency, in s-1, of this radiation. (iii) the energy, in joules, of a single photon of this radiation and the energy, in kj, of 1 mole of this radiation.

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.