s containing the same quantity of water at 25oC. a) You measure the temperatures of the water in the two beakers when each metal has cooled by 10oC and find that the temperature of the water with metal A is higher than the temperature of the water with metal B. Which metal has the greater specific heat? Explain. b) After waiting a period of time, the temperature of the water in each beaker rise
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.
6. You have two samples of different metals, metal A and metal B, each having the same mass.
You heat both metals to 95oC and then place each one into separate beakers containing the same
quantity of water at 25oC.
a) You measure the temperatures of the water in the two beakers when each metal has
cooled by 10oC and find that the temperature of the water with metal A is higher than the
temperature of the water with metal B. Which metal has the greater specific heat? Explain.
b) After waiting a period of time, the temperature of the water in each beaker rises to a
maximum value. In which beaker does the water rise to the higher value, the one with
metal A or the one with metal B? Explain.
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