Suppose 0.562 g of graphite is place in bomb calorimeter with excess of oxygen at 25.00 °C and 1 atm pressure. Excess O2 ensures that all carbon burns to form CO2. The graphite is ignited, and it burns according to the equation C(graphite) + O2(g) >> CO2(g) On reaction, the calorimeter temperature rises from 25.00°C to 25.89° C. The heat capacity of the calorimeter and its contends was determined in a separate experiment to be 20.70 KJ/°C. What is the heat of reaction at 25.00 °C and 1 atm pressure? Express the answer as a thermochemical equation
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.
Suppose 0.562 g of graphite is place in bomb calorimeter with excess of oxygen at 25.00 °C and 1 atm pressure. Excess O2 ensures that all carbon burns to form CO2. The graphite is ignited, and it burns according to the equation C(graphite) + O2(g) >> CO2(g) On reaction, the calorimeter temperature rises from 25.00°C to 25.89° C. The heat capacity of the calorimeter and its contends was determined in a separate experiment to be 20.70 KJ/°C. What is the heat of reaction at 25.00 °C and 1 atm pressure? Express the answer as a thermochemical equation
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