What happens to most probable kinetic energy and the energy of activation with increases in temperature?

Open in App

Solution

Kinetic energy is directly proportional to the absolute temperature and the number of molecules possessing higher energies increases with increase in temperature, i.e., most probable kinetic energy increases with increases in temperature.

The energy of activation is related to temperature by the following Arrhenius equation

$k = A e^{- E_{a} / R T}$

Thus, it also shows an increase with rising in temperature.

Suggest Corrections

Similar questions

According to Maxwell, Boltzmann distribution of energy, ......... .
(a) the fraction of molecules with most probable kinetic energy decreases at higher temperatures
(b) the fraction of molecules with most probable kinetic energy increases at higher temperatures
(c) most probable kinetic energy increases at higher temperatures
(d) most probable kinetic energy decreases at higher temperatures

Q. Assertion :A rate of reaction of most of the reactions doubles, when temperature increased from

298 K

308 K

. Reason: The activation energy of reaction decreases with increase in temperature.

Consider the Arrhenius equation given below and mark the correct option.
$k = A . e - \frac{E_{a}}{R T}$
(a) Rate constant increases exponentially with increasing activation energy and decreasing temperature
(b) Rate constant decreases exponentially with increasing activation energy and decreasing temperature
(c) Rate constant increases exponentially with decreasing activation energy and decreasing temperature
(d) Rate constant increases exponentially with decreasing activation energy and increasing temperature

Q. As we move away from the nucleus, in atom the potential energy of electron increases, the total energy as a whole increases. But what happens to the kinetic energy of the electron?

Q. The volume and the kinetic energy of a gas increases with increase in the temperature.

Join BYJU'S Learning Program