Question

The average kinetic energy (in joules of) molecules in 8.0 g of methane at 27ŗ C is :

• A. 6.21 × 10-20 J/molecule
• B. 6.21 × 10-21 J/molecule
• C. 6.21 × 10-22 J/molecule
• D. 3.1 × 10-22 J/molecule

Answer 1

Answer: (B)

6.21 × 10-21 J/molecule

Answer 2

Average $KE = \frac{3}{2} \times \frac{8.314 \times 300}{6.023 \times 10^{23}} = 6.21 \times 10^{- 21}/Jmolecule.$.