1. (50 points) A batch reactor is being used to destory chemcial A with a initial conentration of 150 mg/L. The reaction can be characterized by second order (r =-kC?), with a rate constant of 0.0007 L/mg-min. Please apply the Euler's emthod, using a spreadsheet to calculate the concentration of chemical A after 1.5 hours, using three time steps: 2 min, 1 min and also 0.5 min. Please compare the results and briefly explain why the results are different (or the same)