The energy required to break one mole of Cl-Cl bonds in Cl_2 is 242 kJ mol^-1 . The longest wavelength of light capable of breaking a single Cl-Cl bon - Chemistry MCQ AIEEE 2026 | ExamTest.live

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The energy required to break one mole of Cl - Cl bonds in Cl_{2} is 242 kJ mol^{- 1} . The longest wavelength of light capable of breaking a single Cl - Cl bond is (c = 3 \times 1 0^{8} m s^{- 1} and N_{A} = 6.02 \times 1 0^{23} mol^{- 1}):

Solution & Step-by-step Explanation

Energy required per bond = \frac{242 \times 1 0 ^{3}}{6.02 \times 1 0 ^{23}} J Using E = \frac{h c}{λ} : λ = \frac{h c}{E} λ = \frac{6.626 \times 1 0 ^{- 34} \times 3 \times 1 0 ^{8} \times 6.02 \times 1 0 ^{23}}{242 \times 1 0 ^{3}} λ = \frac{11.97 \times 1 0 ^{- 2}}{242 \times 1 0 ^{3}} \approx 4.94 \times 1 0^{- 7} m = 494 nm

Try it yourself before checking the explanation above.

The energy required to break one mole of Cl - Cl bonds in Cl_{2} is 242 kJ mol^{- 1} . The longest wavelength of light capable of breaking a single Cl - Cl bond is (c = 3 \times 1 0^{8} m s^{- 1} and N_{A} = 6.02 \times 1 0^{23} mol^{- 1}):

594 nm

640 nm

700 nm

494 nm

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