Hesting Curve of Weter Evaporation Steam 100- Candensastion 50- Water Melting Freezing lce Jeules The graph above shows the heating curve of water. Use this graph to answer the following question. How much heat is required to heat 28 g of ice at -12.0°C (Celsius) to 28 g of water at 59.0°C? spec. heat of H;0 = 4.184 J/g°C spec. heat of ice = 2.087 J/g°C Heat of Fusion = 6.02 kJ/mol 1 mol of water = 18.0g
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.
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