You have 0.500-L of a 0.275-M solution of acetone (C3H6O), initially at 37.0°C. You place a copper brick, initially at a temperature of 150.0°C, into the solution of acetone. The temperature of the acetone and copper brick at thermal equilibrium is 58.0°C. What was the mass of the copper brick? Assume the copper brick does not undergo a phase change over the course of the temperature change. Report your answer in units of g and to 3 significant figures. Hfus = 5.7 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.
You have 0.500-L of a 0.275-M solution of acetone (C3H6O), initially at 37.0°C. You place a copper brick, initially at a temperature of 150.0°C, into the solution of acetone. The temperature of the acetone and copper brick at thermal equilibrium is 58.0°C. What was the mass of the copper brick? Assume the copper brick does not undergo a phase change over the course of the temperature change. Report your answer in units of g and to 3 significant figures.
Hfus = 5.7 kJ/mol
Hvap = 31.3 kJ/mol
Cgas = 75.5 J/mol K
Cliq = 125.5 J/mol K
Csolid = 96 J/mol K
Boiling Point of Acetone = 329 K
Freezing Point of Acetone = 179 K
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 3 images
