A 76 ml solution of a dilute AGNO3 solution is added to 91 mL of a base solution in a coffee-cup calorimeter. As AGOH (s) precipitates, the temperature of the solution increases from 23.44 °C to 25.92 °C. Assuming the mixture has the same specific heat (4.184J/g°C) and density (1.00 g/cm³ or 1.00 g/mL) as water, calculate the heat (in J) transferred to the surroundings, qsurr- Hìnt given in feedback Answer:
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.
![A 76 ml solution of a dilute A9NO3 solution is added to 91 mL of a base solution in a coffee-cup calorimeter. As AGOH (s) precipitates,
the temperature of the solution increases from 23.44 °C to 25.92 °C. Assuming the mixture has the same specific heat (4.184J/g°C) and
density (1.00 g/cm³ or 1.00 g/mL) as water, calculate the heat (in J) transferred to the surroundings, qsurr-
Hìnt given in feedback
Answer:
A 130 mL solution of a dilute acid is added to 184 mL of a base solution in a coffee-cup calorimeter. The temperature of the solution
increases from 22.78 °C to 25.35 °C. Assuming the mixture has the same specific heat (4.184J/g°C) and density (1.00 g/cm³) as water,
calculate the heat (in J) transferred to the surroundings, qsurr-
Hint given in feedback
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