When chemical A and chemical B are mixed together, and endothermic reaction below occurs: 4A(aq) + 3B(aq) 2C(g) To find the enthalpy of this reaction, a scientist pours 25 mL of a 0.67 M solution A into a beaker and measures the temperature to be 21.1 ̊C. To this same beaker the scientist then adds 26 mL of 0.24 M solution B, and finds the temperature to now be 18.6 ̊C. Calculate the molar enthalpy of this reaction for every mole of C produced.
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.
When chemical A and chemical B are mixed together, and endothermic reaction below occurs:
4A(aq) + 3B(aq) 2C(g)
To find the enthalpy of this reaction, a scientist pours 25 mL of a 0.67 M solution A into a beaker
and measures the temperature to be 21.1 ̊C. To this same beaker the scientist then adds 26
mL of 0.24 M solution B, and finds the temperature to now be 18.6 ̊C. Calculate the molar
enthalpy of this reaction for every mole of C produced.
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