ring lab you are given two solutions to use for a coffee-cup calorimetry experiment. The instructor directs you to obtain one hundred milliliters of each solution to use in your experiment. The two solutions are 0.300 M AgNO3 and 0.300 M HCl. Combine the two solutions in a coffee-cup calorimeter and measure the temperature change. You determine the initial temperature is 21.80 �C and the final temperature is 23.20 �C. Assuming the density and specific heat of the resulting solution is 1.00 g/mL and 4.18 J/g ? �C, respectfully, what is the ?H�rxn? Question 20 options: +39.0 kJ/mol +1.17 kJ/mol -39.0 kJ/mol -1.17 kJ/mol
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.
Question 20 options:
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+39.0 kJ/mol
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+1.17 kJ/mol
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-39.0 kJ/mol
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-1.17 kJ/mol
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