Question
AgCl >Ag + Cl
The silver metal that is formed causes the lenses to darken. The enthalpy change for this reaction is 3.10 102 kJ/mol. Assuming all this energy must be supplied by light, what is the maximum wavelength of light that can cause this reaction?
The silver metal that is formed causes the lenses to darken. The enthalpy change for this reaction is 3.10 102 kJ/mol. Assuming all this energy must be supplied by light, what is the maximum wavelength of light that can cause this reaction?
Answers
DrBob222
E = hc/wavelength.
You know E, h, and c. Calculate wavelength.
You know E, h, and c. Calculate wavelength.
Giznelbell
thats not E, its kJ/mol
DrBob222
E IS measured in Joules. You will need to change kJ to Joules by multiplying by 1000. And you will need to convert from a mol to a single photon by dividing by Avogadro's number;however, that is the proper equation to use. OR you could use
E = h*frequency but the question asks for wavelength and you get it with one equation if you use the first one and it takes the second equation + a third one; i.e., c = wavelength*frequency if you use the second one.
E = h*frequency but the question asks for wavelength and you get it with one equation if you use the first one and it takes the second equation + a third one; i.e., c = wavelength*frequency if you use the second one.
Knapp
386nm