Q4 / 90 · KVPY 2012 (SB/SX) · Chemistry
Typical electronic energy gaps in molecules are about $1.0 \mathrm{eV}$. In terms of temperature, the gap is closed to -
- A$10^{2} \mathrm{~K}$
- B$10^{4} \mathrm{~K}$
- C$10^{3} \mathrm{~K}$
- Correct answerD$10^{5} \mathrm{~K}$
Solution
$\begin{array}{l}
\frac{3}{2} \mathrm{KT}=1.6 \times 10^{-19} \\
\frac{3}{2} \times 1.38 \times 10^{-23}=1.6 \times 10^{-19} \\
\mathrm{~T}=10^{5} \mathrm{~K}
\end{array}$
Hence, the correct answer is option: 'D'.