Glossary

GLOSSARY:

Standard Solution: A standard solution is a solution whose concentration is known accurately

Standard Enthalpy change of reaction: Standard enthalpy change of reaction, is the enthalpy change when a reaction occurs in the molar quantities shown from the chemical equation, under standard conditions with all reactants and products in their standard states.

Standard Enthalpy change of formation: Standard enthalpy change of formation, is the enthalpy change when 1 mole of a compound is formed from its elements in their standard states, under standard conditions.

Standard Enthalpy change of combustion: Standard enthalpy change of combustion, is the enthalpy change when 1 mole of a substance is burned completely in oxygen under standard conditions with all reactants and products in their standard states.

Standard Enthalpy change of neutralization: Standard enthalpy change of neutralization, is the enthalpy change when solutions of an acid and an alkali react together to form 1 mole of water, under standard conditions.

Exothermic Reactions: Exothermic reactions give out energy to their surroundings. the products of the reaction end up with less energy than the reactants. This means that the enthalpy change for the reaction will be negative.

Endothermic Reactions: Endothermic reactions take in energy from their surroundings. this means that the products of the reaction have more energy than the reactants, so the enthalpy change for the reaction is positive.