The reaction of hydrochloric acid and sodium hydroxide is a very rapid and exothermic reaction. The equation is: HCl(aq) + NaOH(aq)→NaCl(aq) + H2O(l) In one experiment, a student placed 50.0 mL of 1.125 M HCl at 25.5º C (density = 1.02 g/mL) in acoffee cup calorimeter. To this, the student added 50.0 mL of 1.225 M NaOH also at 25.5º C (density = 1.04 g/mL). The mixture was stirred, and the temperature quickly increased to a maximum of 32.2º C. a. Determine the limiting reactant. b. Calculate the mass of the solution once the HCl (aq) and NaOH (aq) are mixed.
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 4 steps with 2 images
