Question

EXAMPLE 3. A sample of gaseous HI was irradiated by light of wavelength 25378 when 307 J
of energy was found to decompose 1.30 * 10-3 mole of Hi. Calculate the quantum yield for the
dissociation of HI​

Answer 1

Answer:

Quantum Yield = 4.19 x 10-7 moles/J-m

Explanation:

From the above question,

They have given :

A sample of gaseous HI was irradiated by light of wavelength 25378 when 307 J of energy was found to decompose 1.30 * 10-3 mole of Hi. Calculate the quantum yield for the dissociation of HI​.

Quantum Yield:

        The quantum yield is a measure of how efficiently a given amount of energy is converted into a given reaction. In this case, the quantum yield is a measure of how efficiently a given amount of energy (in this case, 307 J) is converted into the dissociation of 1.30 x $10^{-3}$ moles of HI. The quantum yield is calculated by dividing the moles of HI dissociated by the amount of energy used, and then multiplying by the inverse of the wavelength of the light used.

Quantum Yield = (Moles of HI dissociated / 307 J) x (1 J / 25378 m)

Quantum Yield = (1.30 x $10^{-3}$ / 307) x (1 / 25378)

Quantum Yield = 4.19 x 10-7 moles/J-m

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