True or False. Please give a short 1 to 2 sentences on why you think it would be

Question

True or False. Please give a short 1 to 2 sentences on why you think it would be true or false. Any thermally activated process that is described by exp(-Q/RT). where Q is an activation energy, T is temperature, and R is the Universal gas constant (or Boltzmann's constant on an per atom basis) can be thought of as follows: Q is the energy required to make the process happen, and RT (or kT) is the energy available at a given temperature T. Question (a) above applies for both the formation of vacancies in. and diffusion of atoms through, materials. The activation energy for interstitial diffusion of atoms in metals is generally about one-fourth of the activation energy for self-diffusion. This means interstitial atoms often diffuse 109 times faster than the matrix atoms. The pre-exponential factor relates to the entropy of the diffusing species and is secondary to the influence of the exponential factor. The rate of diffusion increases linearly with temperature because of the exponential factor exp(-Q/RT). Fick's 2nd law must be used in the case of non-steady state diffusion, when the diffusion flux and concentration gradient at some particular point in a solid depend on time.

Explanation / Answer

Rate=c*exp(-Q/RT) T T F T T F(Ficks law is used for only steady state)

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