Construct a cooling curve using the following information. The heat capacity of liquid water is 4.18 J/g.°C and the heat of vaporization is 40.7 kJ/mol, the heat of fusion is 6.01kJ/mol and solid water has a heat capacity of 2.03 J/g.°C . If the heat capacity for steam is 1.99J/g.°C, how many kilojoules of heat must be released to convert 521.6 g of steam at 127 °C to ice at - 22 °C?
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.
My teacher said the correct answer to this question is -1623 kJ and I am confused as to how she got that answer. Did she convert from J to kJ or something else? Please help me by explaining how they got this answer. Thank you.
Step by step
Solved in 2 steps with 2 images
