The average kinetic energy of the molecules of a low density gas at 27°C is (Boltzmann constant = 1.38 × 10-23 J K-1)

Question

The average kinetic energy of the molecules of a low density gas at 27°C is (Boltzmann constant = 1.38 × 10-23 J K-1) (A) 3.1 × 10-20 J (B) 3.5 × 10-21 J (C) 5.3 × 10-18 J (D) 6.21 × 10-21 J

Tardigrade Admin · Accepted Answer

Kinetic energy = (3/2) kT = (3/2) ×(1.38×10-23)(300) = 6.21 Ã 10-21 J

Q. The average kinetic energy of the molecules of a low density gas at $2 7^{\circ} C$ is
(Boltzmann constant $= 1.38 \times 1 0^{- 23} J K^{- 1}$ )

$3.1 \times 1 0^{- 20} J$

$3.5 \times 1 0^{- 21} J$

$5.3 \times 1 0^{- 18} J$

$6.21 \times 1 0^{- 21} J$

Kinetic energy $= \frac{3}{2} k T = \frac{3}{2} \times (1.38 \times 1 0^{- 23}) (300)$
$= 6.21 \times 1 0^{- 21} J$

Q. The average kinetic energy of the molecules of a low density gas at 27∘C is (Boltzmann constant =1.38×10−23JK−1)

3.1×10−20J

3.5×10−21J

5.3×10−18J

6.21×10−21J