The energy absorbed by each molecule (A2) of a substance is 4.4× 10-19 J and bond energy per molecule is 4.0× 10-19 JThe kinetic energy of the molecule per atom will be

Question

The energy absorbed by each molecule (A2) of a substance is 4.4× 10-19 J and bond energy per molecule is 4.0× 10-19 JThe kinetic energy of the molecule per atom will be (A) 2.0× 10-20 J (B) 2.2× 10-19 J (C) 2.0× 10-19 J (D) 4.0× 10-20 J

Tardigrade Admin · Accepted Answer

Kinetic energy (KE) of molecule = energy absorbed by molecule - bond energy per molecule =(4.4 × 10-19)-(4.0 × 10-19) J =0.4 × 10-19 J KE per atom =(0.4 × 10-19/2) J =2.0 × 10-20 J

Q. The energy absorbed by each molecule $(A_{2})$ of a substance is $4.4 \times 1 0^{- 19} J$ and bond energy per molecule is $4.0 \times 1 0^{- 19} J$ The kinetic energy of the molecule per atom will be

$2.0 \times 1 0^{- 20} J$

$2.2 \times 1 0^{- 19} J$

$2.0 \times 1 0^{- 19} J$

$4.0 \times 1 0^{- 20} J$

Kinetic energy (KE) of molecule $=$ energy absorbed by molecule $-$ bond energy per molecule
$= (4.4 \times 1 0^{- 19}) - (4.0 \times 1 0^{- 19}) J$
$= 0.4 \times 1 0^{- 19} J$
KE per atom $= \frac{0.4 \times 1 0 ^{- 19}}{2} J$
$= 2.0 \times 1 0^{- 20} J$

Q. The energy absorbed by each molecule (A2​) of a substance is 4.4×10−19J and bond energy per molecule is 4.0×10−19JThe kinetic energy of the molecule per atom will be

2.0×10−20J

2.2×10−19J

2.0×10−19J

4.0×10−20J