A hot 100.0 g lump of an unknown substance initially at Substance Specific heat (J/(g.°C)) 183.0 °C is placed in 35.0 mL of water initially at 25.0 °C and aluminum 0.897 the system is allowed to reach thermal equilibrium. The final graphite 0.709 temperature of the system is 85.0 °C. rhodium 0.243 titanium 0.523 tungsten 0.132 Using this information and the specific heat values for zinc 0.388 several metals in the table, identify the unknown water 4.184 substance. Assume no heat is lost to the surroundings. zinc rhodium titanium aluminum tungsten O graphite
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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