What are the principles of stoichiometry?
The principles of stoichiometry are based upon the law of conservation of mass. Matter can neither be created nor destroyed, so the mass of every element present in the product(s) of a chemical reaction must be equal to the mass of each and every element present in the reactant(s).
How important is stoichiometry?
Given a chemical reaction, stoichiometry tells us what quantity of each reactant we need in order to get enough of our desired product. Because of its real-life applications in chemical engineering as well as research, stoichiometry is one of the most important and fundamental topics in chemistry.
What is the mole ratio used for?
Balanced equations and mole ratios In general, mole ratios can be used to convert between amounts of any two substances involved in a chemical reaction.
What is the mole ratio?
A mole ratio is a conversion factor that relates the amounts in moles of any two substances in a chemical reaction. The numbers in a conversion factor come from the coefficients of the balanced chemical equation.
Do you reduce mole ratios?
The molar ratio can be constructed using any two compounds in the reaction, be they reactants or products. Write the molar ratios for (a) O2 to SO3 and (b) SO2 to SO3. Note that both ratios can be reduced.
What do the coefficients of a balanced equation represent?
Chemical equations express the amounts of reactants and products in a reaction. The coefficients of a balanced equation can represent either the number of molecules or the number of moles of each substance.
Is KJ mol exothermic?
We can look up a table of values to find that the combustion of 1 mole of carbon releases 393.5 kJ of heat energy. Note, the value of ΔH is negative (-) because the reaction is exothermic (releases heat)….Enthalpy Change for Exothermic Reactions.
| energy of reactants | = | energy of products |
|---|---|---|
| C(s) + O2(g) | → | CO2(g) + heat |