Imagine two cooking pots of the same dimensions, each containing a different amount of water at the same initial temperature, 100⁰C. The bottom of the first pot is made of steel, while the bottom of the second pot is made of aluminum. Both pots are placed on a hot surface having a temperature of 180 ⁰C. The water in the steel-bottomed pot boils away completely in 450 s. a) Roughly how much water boiled away from the steel pot, if the bottom has a surface a of 0.031 m2 , and a thickness of 3 mm? b) How long would it take to boil away the same amount of water from the aluminum pot?
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.
Imagine two cooking pots of the same dimensions, each containing a different amount of water at the
same initial temperature, 100⁰C.
The bottom of the first pot is made of steel, while the bottom of the second pot is made of aluminum.
Both pots are placed on a hot surface having a temperature of 180 ⁰C.
The water in the steel-bottomed pot boils away completely in 450 s.
a) Roughly how much water boiled away from the steel pot, if the bottom has a surface a of 0.031 m2
,
and a thickness of 3 mm?
b) How long would it take to boil away the same amount of water from the aluminum pot?
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