q =m Cs AT qcal = Ccal ATcal Cs of water = 4.184 J/(g°C) density of water = 1.00 g/mL A student is preparing to perform a series of calorimetry experiments. She first wishes to determine the calorimeter constant (Ccal) for her coffee cup calorimeter. She pours a 50.0 mL sample of water at 72.5°C into the calorimeter containing a 50.0 mL sample of water at 24.3°C. She carefully records the final temperature of the water as 44.2°C. a) What is (or are) releasing heat in this process? b) What is (or are) absorbing heat in this process? c) Write an equation describing this heat transfer: d) Calculate the heat transfer occurring in the cold water (begin-by writing the eqn). e) Calculate the heat transfer occurring in the warm water (begin by writing the eqn). STP f) Calculate the heat transfer occurring in the calorimeter (write the eqn – refer to (c) above) dima culate the lite st fo g) Calculate the value of Ceal for the calorimeter (write the eqn).
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.
![q =m Cs AT
qcal = Ccal ATcal
Cs of water = 4.184 J/(g°C)
density of water = 1.00 g/mL
A student is preparing to perform a series of calorimetry experiments. She first wishes to determine the
calorimeter constant (Ccal) for her coffee cup calorimeter. She pours a 50.0 mL sample of water at 72.5°C
into the calorimeter containing a 50.0 mL sample of water at 24.3°C. She carefully records the final
temperature of the water as 44.2°C.
a) What is (or are) releasing heat in this process?
b) What is (or are) absorbing heat in this process?
c) Write an equation describing this heat transfer:
d) Calculate the heat transfer occurring in the cold water (begin-by writing the eqn).
e) Calculate the heat transfer occurring in the warm water (begin by writing the eqn).
rSTP
f) Calculate the heat transfer occurring in the calorimeter (write the eqn – refer to (c) above)
g) Calculate the value of Ceal for the calorimeter (write the eqn).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff0e415e7-8bee-4060-af25-bf6904ec9656%2F6d78d625-e9c7-475b-bad2-7334eedabf38%2Fjeixnfo_processed.jpeg&w=3840&q=75)
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