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1 June, 12:45

It takes 242./kJmol to break a chlorine-chlorine single bond. Calculate the maximum wavelength of light for which a chlorine-chlorine single bond could be broken by absorbing a single photon. Round your answer to 3 significant digits.

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  1. 1 June, 12:55
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    The working equation for this is the Planck's Law:

    E = hc/λ

    where

    E is the energy

    h is the Planck's constant equal to 6.62607004*10⁻³⁴ m²· kg / s

    c is the speed of light equal to 3 * 10⁸ m/s

    λ is the wavelength

    Assuming 1 mol of Cl-Cl bond,

    242 kJ * 1000 J/1 kJ = (6.62607004*10⁻³⁴ m²·kg / s) (3*10⁸ m/s) / λ

    λ = 8.214*10⁻³¹ m
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