2. 3. 1. 4. 5. 5. 2. 0. Ť * mass of empty calorimeter mass of calorimeter + water mass of water in calorimeter initial temp. water, Twi final temp. water, Twf change in temp. of water, ATW energy gained by water (J) Rounded value of line 7, q mass of metal initial temp. metal, T1 final temp. metal, T2 ATmetal energy lost by metal, -(line 8) specific heat capacity of metal, Cp Mean value of line 14 Metal 1 32.559 179.949 147.39 27.3 4111 29.5 2.5 150004 1500 57.09 100.0 20.5 70 5 -15005 370.379 100.0 100.0
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. Calculate the heat (q) gained by the water (lost by the metal) in the calorimeter
Mean value:
2. Calculate the specific heat (cp) of the metal.
Mean value:
3. Determine the identity of metal and use the accepted value for specific heat capacity to calculate the percent error.
Metal 1 Identity:
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