【单选题】
已知电对I2/I-和MnO4-/Mn2+在25℃时的标准电极电势分别为0.54V和1.51V,若将其构成原电池的总反应式如下:2 MnO4- + 16H+ + 10I- <img class="kfformula" src="data:image/png;base64,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" data-latex="\leftrightharpoons "/>2 Mn2+ + 8H2O + 5I2, 则该原电池的<img class="kfformula" src="data:image/png;base64,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" data-latex="{E}^{\theta }"/>等于 ( )