Consider a liquid in a container which is open to the atmosphere. We can assume that its temperature does not change with depth. a) Show that a vertical column of the liquid with cross-sectional area A has a weight of ph. Ag at depth h, where p is the liquid's density and g is the acceleration due to gravity. Hence calculate the additional pressure of the liquid at depth h over and above the air pressure at the surface of the liquid. (Think about forces and accelerations. Is the column of water accelerating?) b) A bubble of gas in the liquid rises to the surface from a depth of h. Show that the fractional increase in the volume of the bubble is pgh/Ps where Ps is the atmospheric pressure at the surface of the liquid. You should assume the bubble obeys the ideal gas law.
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.
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