Question

when gaseous HI is irradiated with light of wavelength 253 nm it is absorbed that 1.85×10-2 mole decompose when 4184 joules of radiation absorbed. calculate the quantum yield of the reaction​

Answer 1

Answer:

2.09

Explanation:

1Einstein= (hc/wavelength) * avagadro no.

then ,at wavelength 253nm=253*10^-9 m

here,

1E = (hc/253*10^-9)* avagadro no.

=473.22 kjoule/mol

given,4184 joules radiation absorbed then no. of moles of photon adsorbed,

= 4184 joule/ 473.22*10³joule/mol

=8.84*10^-3 mol

therefore,

quantum yield=[no. of moles reacted] / [no.of moles of photon adsorbed]

=(1.85*10^-2)/(8.84*10^-3)

=2.09