Olivia and Jaime are trying to increase the temperature of a substance by heating it. . What is the quantity of heat in kiloJoules required to raise the temperature of 4.6 kg of the substance from-5∘C to 127 ∘C at a pressure of 1.0 atm? Please keep three significant figures. Useful information: Melting point =293 K heat of fusion =3.90 x 104 J/kg. boiling point is 423 K heat of vaporization 7.80 x 104 J/kg (at a pressure of 1.0 atm). The specific heats for the solid phase is 600 J/(kg K) The specific heats for the liquid phase is 1000 J/(kg K) The specific heats for the gaseous phase is 400 J/(kg K)
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.
Olivia and Jaime are trying to increase the temperature of a substance by heating it. . What is the quantity of heat in kiloJoules required to raise the temperature of 4.6 kg of the substance from-5∘C to 127 ∘C at a pressure of 1.0 atm? Please keep three significant figures.
Useful information: Melting point =293 K
heat of fusion =3.90 x 104 J/kg.
boiling point is 423 K
heat of vaporization 7.80 x 104 J/kg (at a pressure of 1.0 atm).
The specific heats for the solid phase is 600 J/(kg K)
The specific heats for the liquid phase is 1000 J/(kg K)
The specific heats for the gaseous phase is 400 J/(kg K)
Step by step
Solved in 2 steps with 2 images
