Separate chemistry 1 Study Guide

Fuel cells are electrochemical devices that convert the chemical energy of a fuel (usually hydrogen) and an oxidant (usually oxygen) directly into electrical energy, heat, and water. Unlike conventional batteries, fuel cells do not run down or require recharging; they produce electricity continuously as long as fuel and oxidant are supplied. This continuous operation offers significant advantages, particularly for applications requiring sustained power. However, challenges related to fuel production, storage, and infrastructure, as well as cost and durability, affect their widespread adoption. Understanding these factors is crucial for evaluating their suitability for various uses, from powering vehicles to providing stationary backup power.

Ammonium sulfate, a vital nitrogen-based fertilizer, can be produced through the neutralisation reaction between ammonia and sulfuric acid. The approach to this reaction differs significantly depending on whether it's performed on a small scale in a laboratory or a large scale for industrial production. In a laboratory setting, the focus is on precise control to achieve a pure product, often using titration to determine the exact end-point of neutralisation. Reactants are typically pre-prepared solutions. Industrial production, however, prioritises efficiency, continuous operation, and economic viability. Raw materials for both ammonia (Haber process) and sulfuric acid (Contact process) are converted on a massive scale, and the subsequent neutralisation is executed to maximise yield for agricultural demand.