A 99.8-g aluminum calorimeter contains 258 g of water. The aluminum and water are initially in thermal equilibrium at a temperature of 9.5°C. Two solid objects are then placed in the water. One is a 48.3-g piece of copper with a specific heat of 390 J/(kg⋅°C) and an initial temperature of 80.5°C. The other is of unknown material with a mass of 68 g and an initial temperature of 100°C. The entire system reaches thermal
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
A 99.8-g aluminum calorimeter contains 258 g of water. The aluminum and water are initially in thermal equilibrium at a temperature of 9.5°C. Two solid objects are then placed in the water. One is a 48.3-g piece of copper with a specific heat of 390 J/(kg⋅°C) and an initial temperature of 80.5°C. The other is of unknown material with a mass of 68 g and an initial temperature of 100°C. The entire system reaches thermal equilibrium at a temperature of 20.2°C. The specific heats of aluminum and water are 910 J/(kg⋅°C) and 4186 J/(kg⋅°C), respectively.
-Find the specific heat of the unknown material, in units of J/(kg⋅°C).
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