The parallel reactions \( \mathrm{ A + B \mathrel{\stackrel{k_{D}}{\rightarrow}} D } \) and \( \mathrm{ A + B \mathrel{\stackrel{k_{U}}{\rightarrow}} U } \) are carried out in an isothermal semibatch reactor. This simulation compares two scenarios:
      1. pure A is fed to a reactor that initially contains only B
      2. pure B is fed to a reactor that initially contains only A. 
Use sliders to vary the activation energy of each reaction and the isothermal reactor temperature to determine how selectivity and moles of products and reactants change with time. The amounts of both products increase with temperature because the reactions are irreversible.