Question

As the temperature is raised from $20 \, ^{o}C$ to $40 \, ^{o}C$ , the average kinetic energy of neon atoms changes by a factor of which of the following?

• A. $\frac{1}{2}$
• B. $2$
• C. $\frac{\sqrt{313}}{293}$
• D. $\frac{313}{293}$

Answer 1

Answer: (D)

As average K.E. $=\frac{3}{2}\frac{R T}{N_{A}}$
i.e., $\text{K}.\text{E.} \propto \text{T}$
Hence $\frac{K . E ._{313}}{K . E ._{293}}=\frac{313}{293}$