# Pilha Voltaica

Simulação interativa da primeira bateria verdadeira (1800)

> Página canônica: https://elysiatools.com/pt/visualizations/voltaic-pile

- **Categoria:** Physics

## Visão geral

Interactive simulation of Alessandro Volta's 1800 invention - the first true battery, demonstrating the principle of voltage stacking through alternating zinc and copper discs separated by electrolyte-soaked pads. Features voltage equation: V_total = n·V_cell (where n = number of layers, V_cell ≈ 0.76V for Zn-Cu pair), oxidation reaction at anode: Zn → Zn²⁺ + 2e⁻, reduction reaction at cathode: Cu²⁺ + 2e⁻ → Cu, cell potential: E° = +0.76V (standard electrode potential difference). Multi-view visualization system includes: (1) 3D Pile View showing alternating circular discs with copper (orange/red) and zinc (gray) metals, electrolyte pads (light blue), spiral electron flow animation, positive terminal (+, red) at top, negative terminal (-, blue) at bottom; (2) Side Section View displaying rectangular cross-section with labeled metal layers (Zn/Cu), electrolyte-soaked separators, external circuit with dashed electron flow path; (3) Circuit Diagram showing cells connected in series with standard battery symbols, external load resistor, complete current path; (4) Voltage Graph plotting total voltage vs number of layers with linear relationship V ∝ n, current operating point highlighted in red. Adjustable parameters: layer count n (2-20), voltage per cell V_cell (0.1-2.0 V), pile radius (40-120 mm), electron speed (0.1-3.0x), electron density (5-30 particles). Display options: show/hide electron flow animation, voltage labels on each layer, chemical reaction equations. Real-time calculations: total voltage display, individual cell voltage, electron flow direction indicator. Historical context section covering: Volta vs Galvani debate on animal electricity, invention year 1800, demonstration to Napoleon in 1801, Nobel Prize recognition, the volt unit named in Volta's honor. Technical details: electrochemical principle of redox reactions, electrolyte function (originally brine - NaCl solution), ion transport completing internal circuit, electrode materials (zinc anode, copper cathode), voltage drop issues due to hydrogen bubble polarization, subsequent improvements (Daniell cell 1836, lead-acid battery 1859). Applications and impact: enabled Humphry Davy's electrolysis discoveries (sodium, potassium isolation), led to Michael Faraday's electric motor and electromagnetic induction, foundation for modern battery technology from alkaline cells to lithium-ion. Limitations covered: polarization effect increasing internal resistance, electrolyte leakage, voltage degradation during use. Color scheme: cyan/teal theme with blue-greens (#0891b2, #06b6d4) for headers, copper (#b87333) and zinc (#71797E) realistic metal colors, blue electrons (#3b82f6), green start button (#10b981), red stop button (#ef4444), gray reset button (#6b7280). Multi-language support (zh, en, de, fr, es, ru, pt) with complete translations for all UI elements, formulas, and educational content. Interactive controls: start/stop electron animation, reset to default 3-layer configuration, view mode switching, parameter sliders with live value display.

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