Measurement Trial #1 Trial #2 Trial #3 mass of water/calorimeter/lid 82.73g 82.02g 84.46g mass of empty calorimeter & lid: 8.12g 8.16g 8.18g Mass of Water 74.61g 73.86g 76.28g Tf of water (in calorimeter) 26.8c 26.1c 26.4c Ti of distilled water: 20.6c 20.4c 20.3c ΔT water 5.48c 5.7c 6.1c Determine the amount of heat transferred from the metal cylinder to the water in the calorimeter for each trial using the equation below. The change in temperature used for this calculation is the change in temperature of the water (ΔTwater). Show your work. Do not round your answers for these calculations. qwater = mwater ´ Cp of water ´ ΔT water
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.
|
Measurement |
Trial #1 |
Trial #2 |
Trial #3 |
|
mass of water/calorimeter/lid |
82.73g |
82.02g |
84.46g |
|
mass of empty calorimeter & lid: |
8.12g |
8.16g |
8.18g |
|
Mass of Water |
74.61g |
73.86g |
76.28g |
|
Tf of water (in calorimeter) |
26.8c |
26.1c |
26.4c |
|
Ti of distilled water: |
20.6c |
20.4c |
20.3c |
|
ΔT water |
5.48c |
5.7c |
6.1c |
Determine the amount of heat transferred from the metal cylinder to the water in the calorimeter for each trial using the equation below. The change in temperature used for this calculation is the change in temperature of the water (ΔTwater). Show your work. Do not round your answers for these calculations.
qwater = mwater ´ Cp of water ´ ΔT water
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 4 images
