MISSED THIS? Watch IWE: Measuring AErxn in a Bomb Calorimeter, Read Section 7.5. You can click on the Review link to access the section in your e Text. Mothballs are composed primarily of the hydrocarbon naphthalene (C₁0 Hs). When 0.820 g of naphthalene burns in a bomb calorimeter, the temperature rises from 25.10 °C to 31.56 °C. Part A Find A Erxn for the combustion of naphthalene. The heat capacity of the calorimeter, determined in a separate experiment, is 5.11 kJ/°C. Express the change in energy in kilojoules per mole to three significant figures. View Available Hint(s) AErxn= Submit IVE ΑΣΦ ? kJ/mol
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.
∆E of reaction can be calculated based on how much heat is absorbed by water and calorimeter.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
