The energy required to break one mole of Cl-Cl bonds in Cl2 is 242 kJ mol-1. The longest wavelength of light capable of breaking a single Cl - Cl bond is (c = 3 × 108 ms-1 and NA = 6.02 × 1023 mol-1)

Question

The energy required to break one mole of Cl-Cl bonds in Cl2 is 242 kJ mol-1. The longest wavelength of light capable of breaking a single Cl - Cl bond is (c = 3 × 108 ms-1 and NA = 6.02 × 1023 mol-1) (A) 594 nm (B) 640 nm (C) 700 nm (D) 494 nm

Tardigrade Admin · Accepted Answer

Energy required for 1 Cl2 molecule = (242×103/NA) Joules. This energy is contained in photon of wavelength âλâ. (hc/λ) = E ⇒ (6.626× 10-34× 3× 108/λ) = (242× 103/6.022× 1023) λ = 4947 mathringA ≈ 494 nm

Q. The energy required to break one mole of $Cl - Cl$ bonds in $C l_{2}$ is $242 k J m o l^{- 1}$ . The longest wavelength of light capable of breaking a single $Cl - Cl$ bond is
( $c = 3 \times 108 m s^{- 1}$ and $N A = 6.02 \times 1 0^{23} m o l^{- 1}$ )

$594 nm$

$640 nm$

$700 nm$

$494 nm$

Q. The energy required to break one mole of Cl−Cl bonds in Cl2​ is 242kJmol−1. The longest wavelength of light capable of breaking a single Cl−Cl bond is (c=3×108ms−1 and NA=6.02×1023mol−1)

594nm

640nm

700nm

494nm

Energy required for 1Cl2​ molecule =NA​242×103​ Joules. This energy is contained in photon of wavelength ‘λ’. λhc​=E⇒λ6.626×10−34×3×108​=6.022×1023242×103​ λ=4947A˚≈494nm

Q. The energy required to break one mole of $Cl - Cl$ bonds in $C l_{2}$ is $242 k J m o l^{- 1}$ . The longest wavelength of light capable of breaking a single $Cl - Cl$ bond is
( $c = 3 \times 108 m s^{- 1}$ and $N A = 6.02 \times 1 0^{23} m o l^{- 1}$ )

$594 nm$

$640 nm$

$700 nm$

$494 nm$