Energy can be removed from water as heat at and even below the normal freezing point (0.0 C at atmospheric pressure) without causing the water to freeze; the water is then said to be supercooled. Suppose a 1.00 g water drop is supercooled until its temperature is that of the surrounding air, which is at -5.00C. The drop then suddenly and irreversibly freezes, transferring energy to the air as heat.What is the entropy change for the drop?
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.
Energy can be removed from water as heat at
and even below the normal freezing point (0.0 C at atmospheric
pressure) without causing the water to freeze; the water is then
said to be supercooled. Suppose a 1.00 g water drop is supercooled
until its temperature is that of the surrounding air, which
is at -5.00C. The drop then suddenly and irreversibly freezes,
transferring energy to the air as heat.What is the entropy change
for the drop?
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