Calculations: Calculate the moles of each reactant. Note that the hydrobromic acid and hydrogen peroxide solutions are provided as concentrated aqueous solutions. The hydrobromic acid solution is 48% HBr by mass and the density of the solution is 1.49 g/mL. The hydrogen peroxide solution is 30% H2O2 by mass and the density of the solution is 1.11 g/mL. For each of these reactants, use the density to calculate the mass of solution and use the percent by mass to calculate the mass of solute (HBr or H2O2), before using the molar mass to calculate moles. Determine the limiting reactant and calculate the percentage yield. Show the calculations (these may be hand written or generated using the equation editor). Summarize the information in the reaction table (see next page). Page 11 of 19 CHEMISTRY 2400 EXPERIMENT 7: BROMINATION OF CINNAMIC ACID WINTER 2022 "product" Hydrobromic acid compound Cinnamic acid Hydrogen peroxide Stoichiometric coefficient Molar mass Density N/A N/A (if applicable) Concentration or N/A N/A percent composition (if applicable) Volume used (if N/A N/A applicable) mass of solution N/A N/A Mass of solute moles used N/A moles N/A x (ratio of stoich. coefficients)** Identify Limiting Reagent N/A
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.


Trending now
This is a popular solution!
Step by step
Solved in 3 steps









