Gas Stoichiometry Calculator
Calculate the volume of a gas produced or consumed in a chemical reaction at standard temperature and pressure (STP) or at any specified conditions. Uses the ideal gas law PV = nRT with R = 0.08206 L·atm/(mol·K).
Gas stoichiometry combines the principles of chemical stoichiometry with the ideal gas law to determine volumes of gaseous reactants and products. At STP (0°C and 1 atm), one mole of any ideal gas occupies exactly 22.414 liters, known as the molar volume.
The ideal gas law, PV = nRT, relates pressure (P), volume (V), amount in moles (n), the gas constant (R = 0.08206 L·atm/(mol·K)), and absolute temperature (T in Kelvin). This equation allows conversion between moles and volume at any temperature and pressure, making it essential for laboratory and industrial gas calculations.
In practice, gas stoichiometry is used to determine how much gas is produced in reactions such as combustion, decomposition, and acid-metal reactions. For example, reacting zinc with hydrochloric acid produces hydrogen gas, and the volume collected can be predicted using the moles of zinc and the ideal gas law at laboratory conditions.