{"product_id":"nernsts-battery-plate-096-physics-poster","title":"Nernst's Battery – Plate 096 Physics Poster","description":"\u003cp\u003ePlate 96 speaks for itself: \u003cem\u003e“Potassium alone would charge each cell to −89 millivolts.”\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eIon concentration differences across a cell membrane store energy. The Nernst equation gives the voltage at which a single ion's diffusion is balanced by the electric field.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eE = (RT \/ zF) ln([out] \/ [in])\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eE: equilibrium potential, V\u003c\/li\u003e\n\u003cli\u003eR: gas constant 8.314 J mol⁻¹ K⁻¹\u003c\/li\u003e\n\u003cli\u003eT: temperature, K\u003c\/li\u003e\n\u003cli\u003ez: ion charge number, dimensionless\u003c\/li\u003e\n\u003cli\u003eF: Faraday constant 96 485 C mol⁻¹\u003c\/li\u003e\n\u003cli\u003e[out], [in]: concentrations, mol m⁻³ (quoted in mM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAt 310 K, RT\/F = 26.7 mV. K⁺ 5\/140 mM: −89 mV. Na⁺ 145\/12 mM: +67 mV.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e Real resting potentials (about −70 mV) sit between these because the membrane passes several ions.\u003c\/p\u003e\u003ch3\u003eSources\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eW. Nernst, Z. Phys. Chem. 4, 129 (1889).\u003c\/li\u003e\n\u003cli\u003eB. Hille, Ion Channels of Excitable Membranes, 3rd ed. (2001).\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOn the poster\u003c\/h3\u003e\u003cp\u003ePlate 096, “Nernst's Battery”: the pixel-art plate with its slogan “Potassium alone would charge each cell to −89 millivolts.”, the key equation and the facts panel shown above. Pixelated Physics. Physics. Personified.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"9'' x 12\" (Vertical) \/ Matte","offer_id":50962734874727,"sku":"63280642770713697595","price":19.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Fine Art","offer_id":50962734907495,"sku":"13265944941620796956","price":29.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Semi Glossy","offer_id":50962734940263,"sku":"29220589751218969357","price":19.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Fine Art","offer_id":50962734973031,"sku":"31804384712489635629","price":44.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Semi Glossy","offer_id":50962735005799,"sku":"27985094945708538799","price":29.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Matte","offer_id":50962735038567,"sku":"18491454307563174868","price":29.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Matte","offer_id":50962735071335,"sku":"64831496431046295978","price":69.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Fine Art","offer_id":50962735104103,"sku":"25388698266385959303","price":119.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Semi Glossy","offer_id":50962735136871,"sku":"30469446102173125979","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/16394045389189329691_2048.jpg?v=1793637998","url":"https:\/\/pixelatedphysics.com\/es\/products\/nernsts-battery-plate-096-physics-poster","provider":"Pixelated Physics","version":"1.0","type":"link"}