Exp. 2:Determine the Enthalpy of Neutralization of HCI by NH3 Temp of empty calorimeter= 21.5C, calorimeter zeroed out on scale Grabbed 50ml graduated cylinder, measured 25 mL of 2.0O M HCI into the graduated cylinder. Volume at meniscus=25ml. Poured all HCI into the calorimeter, highest temp after transfer of HCI=21.5C Grabbed new 50ml graduated cylinder, added 25 mL of 2.00 M ammonia (NH3) volume at meniscus3D25ml Added 25ml 2.00M ammonia (NH3) to the calorimeter Highest temp recorded=29.5C Mass of reaction solution = 50.731g
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.
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