Q3- When 1.5 g of fructose, C6H12O6, is burned in oxygen in a bomb calorimeter, the temperature of the calorimeter is decreases about 1.58 °C. If the heat capacity of the calorimeter and its contents is 9.90 kJ/°C, what is qram for this combustion? and is this reaction endothermic or exothermic? A) -15.64 kJ, exothermic reaction B) 15.64 kJ, endothermic reaction D) 12.34 kJ, endothermic reaction C) -12.34 kJ, exothermic reaction Q4- Which one of the following is correct about your thermodynamic experiment? A) A bomb calorimeter was used to measuring the heat of reaction. B) The heat gained by calorimeter equal zero. C) A cup calorimeter was used to measuring the temperature change of solution. D) The atmospheric pressure was affected your experiment.
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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