and cooking with chemicals Stoichiometry and cooking with chemicals

Interpret a balanced equation in terms of moles, mass, and volumes of gases.   Solve stoichiometric problems involving moles, mass, and volume, given a balanced chemical reaction. Include: heat of reaction Additional KEY Terms Stoichiometry Molar ratio

“The calculation of quantities in chemical reactions.” STOICHIOMETRY “The calculation of quantities in chemical reactions.” N2 (g) + 3 H2 (g) 2 NH3 (g) H N 1 molecule + 3 molecules 2 molecules

Only the mass and atoms are conserved in every chemical reaction. N2 (g) + 3 H2 (g) 2 NH3 (g) 1 mole + 3 moles 2 moles 28g + 6g 34g 22.4 L + Only the mass and atoms are conserved in every chemical reaction.

1 N2 2 NH3 3 H2 1 N2 1 N2 3 H2 N2 (g) + 3 H2 (g) 2 NH3 (g) Molar Ratio 1 N2 : 3 H2 1 N2 : 2 NH3 3 H2 1 N2 1 N2 3 H2 1 N2 2 NH3

N2 (g) + 3 H2 (g) 2 NH3 (g) How many moles of H2 are used with a) 2 mol N2 b) 0.5 mol N2 1 mol N2 3 mol H2 2 mol N2 = 6 mol H2 1 mol N2 3 mol H2 0.5 mol N2 = 1.5 mol H2

N2 (g) + 3 H2 (g) 2 NH3 (g) 2 mol NH3 0.350 mol H2 = 0.233 mol NH3 How many moles of ammonia gas can be made from 0.350 moles of hydrogen gas? N2 (g) + 3 H2 (g) 2 NH3 (g) 3 mol H2 2 mol NH3 0.350 mol H2 = 0.233 mol NH3

Stoichiometry is the study of quantities in chemical reactions. Coefficients describe the number of moles of reactants and products involved in the reaction. The molar ratio is the ratio of coefficients for two substances in a reaction. Molar ratio used to determine the amounts reactant needed, or product formed in a chemical reaction.

CAN YOU / HAVE YOU? Interpret a balanced equation in terms of moles, mass, and volumes of gases.   Solve stoichiometric problems involving moles, mass, and volume, given a balanced chemical reaction. Include: heat of reaction Additional KEY Terms Stoichiometry Molar ratio