Chapter 5, Problem 38P

The temperature dependence of the diffusion coefficient D (cm²/s) is given by an Arrhenius type equation:

$D=D_0{e}^{\left(-\frac{E_e}{RT}\right)}$

whereD₀(cm²/s) is pre-exponential constant, E_a(J/mol) is activation energy for diffusion, R = 8.31 (J/mol-K) is the gas consent, and T is temperature in Kelvin. For diffusion of carbon into stainless steel D₀= 6.18 cm²/s, and E_a= 187 KJ/mol. Make two plots of D versus Tfor $200\le T\le 800\text{C}$ . In the first plot use linear scale for both axes and in the Second plot use linear scale for T and logarithmic scale for D. Which plot is more useful?