Lead has a heat of fusion of 23.140 J/g, along with a specific heat of o.12928 J/(g °C) in its solid state. I have 207.1 grams of lead shot that I would like to re-cast into an ingot. This requires heating the lead shot from a room temperature of 25.2 °C to its melting temperature of 327.46 °C. How many J of energy do I need to add to this lead shot, to get 207.1 grams of molten lead? O a. 14302 Joules O b. 8093 Joules O c. 12885 Joules O d. 11210 Joules O e. 4792 Joules
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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I have 207.1 grams of lead shot that I would like to re-cast into an ingot. This requires heating the lead shot from a room
temperature of 25.2 °C to its melting temperature of 327.46 °C.
How many J of energy do I need to add to this lead shot, to get 207.1 grams of molten lead?
a. 14302 Joules
O b. 8093 Joules
O c. 12885 Joules
O d. 11210 Joules
O e. 4792 Joules"
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