In order to solve a complex physical chemistry problem, brain requires some "neural energies" which are electrical in nature. Each problem on an average requires 21 Joules of neural energy. Calculate minimum amount of glucose required to solve 10 such problems if all electrical energy is obtained from oxidation of glucose: 

[Given : $\mathrm{\Delta }{H}_{\text{combustion }}^{\circ }$of glucose $=-2800\mathrm{kJ}/\mathrm{mole}$

$\mathrm{\Delta }{S}_{\text{combustion }}^{\circ }$of glucose $=-\frac{1000}{3}\mathrm{J}/\mathrm{molK}$

Temperature = 300 K ].