A 2.81 g sample of methanol, CH3OH, is combusted in a bomb calorimeter. The temperature of the calorimeter increases by 11.1°C. If the heat capacity of the bomb is 727.1 J/°C and it contains 1200 kg of water, what is the heat evolved in kJ/mol of methanol combusted? The specific heat capacity of water is 4.184 J/g°C and the molar mass of methanol is 32.04 g/mol. Show your answer in TWO (2) decimal places. Do not include the units in your final 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 2.81 g sample of methanol, CH3OH, is combusted in a bomb calorimeter. The temperature of the calorimeter increases by 11.1°C. If the heat capacity of the bomb is 727.1 J/°C and it contains 1200 kg of water, what is the heat evolved in kJ/mol of methanol combusted? The specific heat capacity of water is 4.184 J/g°C and the molar mass of methanol is 32.04 g/mol.
Show your answer in TWO (2) decimal places. Do not include the units in your final answer.
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