Q82 The photochemical dissociation of chlorine results in the production of two chlorine atoms , one .in the ground state and another in the excited stat
Cl2 -- CI+ CI
The maximum wavelength () needed for this is 174 nm. If the excitation energy.for cl -- cl* is 3.15 ×10 -¹⁹ J , then how much energy is needed for.such
dissociation of one mole of chlorine into normal atoms?
Ops: A
O 600 kJ/ Mol
B.
O 550 kJ/ Mol
c. 150 kJ/ Mol
D.
O 500 kJ/ Mol
Answers
Answer:
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Tissue is a group of cells that have similar structure and that function together as a unit. A nonliving material, called the intercellular matrix, fills the spaces between the cells. This may be abundant in some tissues and minimal in others.
Answer:
D) 500 kJ mol⁻¹ approximately is the right answer.
Explanation:
Energy required per molecule in the process,
Cl₂ ⇒ Cl + Cl may be given as
E=hc/λ = 6.626×10⁻¹⁶×3×10⁸ / 174×10⁻⁹
=11.424×10⁻¹⁹ J mol⁻¹
Energy for Cl ⇒ Cl * is 3.15×10⁻¹⁹ J
Then energy for Cl₂ ⇒ 2Cl will be,
11.424×10⁻¹⁹ −3.15×10⁻¹⁹ = 8.274×10⁻¹⁹ J
For one mole = E × NA (Avogadro number)
=8.247×10⁻¹⁹ × 6.023×10²³
=498.3 kJ mol−1