Calorimetry: Specific Heat and Heat of Solution
Summary
These experiments were conducted to find the specific heat of a metal as well as the heat of solution of a solid. Both experiments required the use of calorimetry to measure heat flow and temperature change. The specific heat of the metal was found by heating it in boiling water before transferring it to the calorimeter that was partially filled with water. After shaking the calorimeter, the temperature change was measured and recorded. This information was used to calculate the specific heat.
The heat of solution of a solid was found similarly. The solid sample was added to the water in the calorimeter and gently swirled. After the solid completely dissolved and the temperatures reached equilibrium, the changes were measured
Introduction
Calorimetry is often used to observe and measure heat flow between two substances. It is useful in providing such information because its contents are isolated. Therefore, calorimetry can measure only the heat flow of its contents. Heat flow is measured as it travels from a higher temperature to a lower one.
Experiment A required solving for the specific heat of a metal. Specific heat is an amount of heat required to raise the temperature of one gram of anything one degree Celsius. Specific heat was calculated using several equations. First heat flow of water was solved by using the equation:
Q water = C x m x T
Heat flow = Specific Heat x mass x (Final Temperature- Initial Temperature).
After finding the heat flow of the water, the heat flow of the metal was calculated using another equation:
Q water = - Q metal or Q water = -(C x m x T) metal
This equation was rearranged to solve for the specific heat of the metal. The molar mass of the metal was found by using the equation:
MM = 25 / C (J/g° C)
Experiment B was conducted to find the heat of solution of an unknown solid. After finding the heat flow of the water, enthalpy change of the reaction was found by using the equation:
Q reaction = H
These experiments were conducted to find the specific heat of a metal as well as the heat of solution of a solid. Both experiments required the use of calorimetry to measure heat flow and temperature change. The specific heat of the metal was found by heating it in boiling water before transferring it to the calorimeter that was partially filled with water. After shaking the calorimeter, the temperature change was measured and recorded. This information was used to calculate the specific heat.
The heat of solution of a solid was found similarly. The solid sample was added to the water in the calorimeter and gently swirled. After the solid completely dissolved and the temperatures reached equilibrium, the changes were measured
Introduction
Calorimetry is often used to observe and measure heat flow between two substances. It is useful in providing such information because its contents are isolated. Therefore, calorimetry can measure only the heat flow of its contents. Heat flow is measured as it travels from a higher temperature to a lower one.
Experiment A required solving for the specific heat of a metal. Specific heat is an amount of heat required to raise the temperature of one gram of anything one degree Celsius. Specific heat was calculated using several equations. First heat flow of water was solved by using the equation:
Q water = C x m x T
Heat flow = Specific Heat x mass x (Final Temperature- Initial Temperature).
After finding the heat flow of the water, the heat flow of the metal was calculated using another equation:
Q water = - Q metal or Q water = -(C x m x T) metal
This equation was rearranged to solve for the specific heat of the metal. The molar mass of the metal was found by using the equation:
MM = 25 / C (J/g° C)
Experiment B was conducted to find the heat of solution of an unknown solid. After finding the heat flow of the water, enthalpy change of the reaction was found by using the equation:
Q reaction = H