For all calculations, include the proper number of significant figures and appropriate units. Show your work! Part A. Determination of the Heat Capacity of the Calorimeter After the experiment, what is the temperature final of the system? It = 25.10 °C Using the extrapolated Tr and your experimentally determined initial temperature Ti, calculate the change in temperature AT for the reaction. AT = T = Ti AT = 25.10 °C – 20.00 °C AT = 5.10 °C Given the following information and the actual amount of reactant used in the experiment, caleulate the heat, q, (in Joules) produced by the reaction. H* (ag)_+ OH (ag) → H20 (1) AH° = -55.83 kJ/mol q=nx AH 1.0 m x -55.83 kJ/mol = -55.83 kJ q= -55830 J (A.4) Using the equation, calculate the total heat capacity of the calorimeter, C, in J/9C, C =- qAT 55830 J/ 5.10 °C C = 10974.06 J/°C 1. If the value of the heat capacity (C) calculated in Part A of the experiment were too high, what effect would this have on your value for AH, the enthalpy changes for the reaction between magnesium metal and hydrochloric acid? Be specific. Would your answer be too high, or too low, and why?
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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