Question

The kinetic energy of a mole of ideal gas in calories is approximately equal to ___________.

• A. $3$ times its absolute temperature
• B. $2$ times its absolute temperature
• C. $4$ times its absolute temperature
• D. $2/3$ times its absolute temperature

Answer 1

The correct option is A $3$ times its absolute temperature

$KE=\frac{3}{2}RT=\frac{3}{2}\times 2\times T=3T$

Note: R = 1.987 (approx 2) cal/K-mol

Thus, KE is approximately equal to 3 times its absolute temperature.