Calculate the mean kinetic energy of the molecules of an ideal gas at temperatures: - 50 ° C,0 ° C and 1000 ° C

Answer 1

Average Kinetic Energy per molecule of an ideal gas is given as

KE = (3/2) kT

where k= Boltzmann Constant, and T= Temperature on Kelvin scale

k= 1.38*10^-23 J/K

-50⁰C = 273-50 = 223 K

so KE =(3*1.38*10^-23 *223)/2 Joule= 461.6* 10^{- 23} J = 4.62 *10 ^-21 J

Similarly 0⁰C = 273 K and 1000⁰ C = 1273 K