When iron reacts with vinegar, the metal rusts and causes an exothermic chemical reaction, which produces heat. This is commonly reproduced in experiments with either an iron nail or steel wool and vinegar. More »

Iron rusts when it comes in contact with oxygen and water. It rusts faster in acid rain and salty water. Both oxygen and water are necessary for rusting, which is an oxidation reaction. More »

Iron reacts with hydrochloric acid to produce dihydrogen and iron(II) chloride. When an HCl solution is added to iron powder, the H+ and Cl- ions from hydrochloric acid disassociate. The Cl- anions form ionic bonds with ... More »

Sodium bicarbonate, commonly referred to as baking soda, and acetic acid, which is vinegar, combine to create an acid-base chemical reaction. The baking soda serves as the base and the vinegar is the acid. More »

The standard enthalpy of reaction denotes the heat lost or gained during a chemical reaction when one molar mass of a substance reacts under standard conditions. The standard enthalpy of reaction is shown as "?H" or "del... More »

www.reference.com Science Chemistry

Hand warmers work by creating an exothermic chemical reaction that produces heat when the contents react with air or each other. Most commonly, hand warmers use pouches of fine iron filings that oxidize in the presence o... More »

A chemical reaction can be shown to be endothermic if it absorbs heat and causes a decrease in the temperature of its surroundings. Illustrative lab experiments performed in schools to demonstrate endothermic reactions o... More »

www.reference.com Science Chemistry