49 g of an unknown metal is heated to a temperature of 150.0 C. A calorimeter is filled with 120.0 g of water at an initial temperature of 20.0 C. The specific heat capacity of water is 4.184 J/gC. The hot metal is placed inside the calorimeter and the system is allowed to reach equilibrium. The equilibrium temperature is 22.70 C. How much heat did the water absorbed from the metal? Show your work. what is the value of Q for the metal based on your calcuated value of Q for the water? Now that you know the Q for the metal, use the data to calculate the specific heat capacity of the metal. Show your work and use proper significant digits and units in your answer.
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.
1. 49 g of an unknown metal is heated to a temperature of 150.0 C. A calorimeter is filled with 120.0 g of water at an initial temperature of 20.0 C. The specific heat capacity of water is 4.184 J/gC. The hot metal is placed inside the calorimeter and the system is allowed to reach equilibrium. The equilibrium temperature is 22.70 C.
How much heat did the water absorbed from the metal? Show your work.
what is the value of Q for the metal based on your calcuated value of Q for the water?
Now that you know the Q for the metal, use the data to calculate the specific heat capacity of the metal. Show your work and use proper significant digits and units in your answer.
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