Dien luong chuyen qua binh trong $\frac{T}{2}$ chu ki la $q=\int\limits_{0}^{\frac{T}{2}}5\sqrt{2}cos(100\pi t+\frac{\pi }{2})=\frac{5\sqrt{2}}{100\pi }sin(100\pi t+\frac{\pi }{2})\left\{ \begin{array}{l} \frac{T}{2}\\ 0 \end{array} \right.$
$q=-\frac{\sqrt{2}}{10\pi } (C)$
Vay so mol e nhuong va nhan trong cac qua trinh la
$n_{e}=\frac{q}{eN_{A}}=\frac{\frac{\sqrt{2}}{10\pi }}{1,6.10^{-19}.6,02.10^{23}}=4,674.10^{-7}(mol)$
Catot : $2H^{+}+2e-->H_{2}$ Anot: $H_{2}O-2e-->2H^{+}+\frac{1}{2}O_{2}$
Tong so mol khi o 2 dien cuc la
$n=\frac{n_{e}}{2}+\frac{n_{e}}{4}=\frac{3n_{e}}{4}$
Vay the tich khi thoat ra la :
$V=\frac{3n_{e}}{4}.22,4=7,85.10^{-6}$
P/S: Cai de bai hoi co van de vi bat tinh moi khi thi o 2 dien cuc the tich khi ko bang nhau. O day ta tinh the tich tong!!!!!