Write the equation for roasting iron pyrite in the absence...

Write the equation for roasting iron pyrite in the absence of air to form elemental sulfur. Calculate the volume of $\mathrm{S}_{2}$ gas that can be produced from roasting $5.5 \mathrm{~kg}$ of iron pyrite. Assume that all of the sulfur in the iron pyrite is converted to $\mathrm{S}_{2}$ gas. (Assume STP to calculate the gas volume.)

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Key Concepts

Roasting Reaction

A roasting reaction is a heat?induced chemical transformation in which a mineral or ore is decomposed to form simpler compounds. In this context, roasting refers to the thermal decomposition of a complex metal sulfide in the absence of air, which causes the liberation of elemental sulfur in the form of a gas.

Chemical Equation Balancing

Balancing chemical equations is the process of ensuring that the number of atoms for each element is the same on both sides of a reaction equation. This is crucial for representing the conservation of mass and for using the equation to relate the amounts of reactants and products via stoichiometric coefficients.

Stoichiometry

Stoichiometry involves using the quantitative relationships defined by a balanced chemical equation to convert between amounts of reactants and products. This includes converting masses to moles using molar masses and applying mole ratios derived from the equation to determine quantities of substances produced or consumed in a reaction.

Molar Volume at STP

At Standard Temperature and Pressure (STP), one mole of an ideal gas occupies a fixed volume. This concept allows one to directly convert between the number of moles of a gas produced by a chemical reaction and its volume, using the standard molar volume (commonly 22.4 L/mole in calculations).

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