• • To complete this assignment follow the instructions Handwritten on A4 unruled sheets and later uploaded in pdf format Any answers must not be copied from any source • Plag of any kind is not acceptable once detected by us • Provide detailed explanation for positive ratings and feedback Burning coal Q3 (3 points) A spherical coal is burnt with the reaction 2C(s) + Oz in air O2(g)2CO(g) due to the deficiency of oxygen as shown in the left figure. With the procedure discussed in lecture 12, please prove that the decrease in the size of charcoal R follows the expression (R2-R)/t 4 In 1.2 Cmix Doz Mc/Pc, where Doz is the diffusivity of Oz in the mixture of air and exhaust (of overall concentration mix) and P. Me. Ro are the density, the molecular weight, and the initial radius of coal, respectively.