steamcan cause more serious burns than water at the same temperature. Here we examine this effect quantitatively, noting that fleshbecomes badly damaged when its temperature reaches 50.0 °C.(a) Calculate the heat released as 12.5 g of liquid water at 100 °Cis cooled to 50.0 °C. (b) Calculate the heat released when 12.5 g ofsteam at 100 °C is condensed and cooled to 50.0 °C. (c) Find themass of flesh that can be heated from 37.0 °C (normal body temperature) to 50.0 °C for the cases considered in parts (a) and (b).(The average specific heat of flesh is 3500 J>kg # K.)
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.
steam
can cause more serious burns than water at the same temperature. Here we examine this effect quantitatively, noting that flesh
becomes badly damaged when its temperature reaches 50.0 °C.
(a) Calculate the heat released as 12.5 g of liquid water at 100 °C
is cooled to 50.0 °C. (b) Calculate the heat released when 12.5 g of
steam at 100 °C is condensed and cooled to 50.0 °C. (c) Find the
mass of flesh that can be heated from 37.0 °C (normal body temperature) to 50.0 °C for the cases considered in parts (a) and (b).
(The average specific heat of flesh is 3500 J>kg # K.)
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