When a substance is heated molecules begin to vibrate and move more usually creating more distance between themselves. The mathematical equation for an ideal gas undergoing a reversible ie no entropy generation adiabatic process can be represented by the polytropic process equation where P is pressure V is volume and for this case n g where C P being the specific heat for constant pressure C V being the specific heat for constant volume g is the adiabatic index and f is the number of. When Volume increases pressure must decrease that was in the first lesson on thermodynamics.
This video derives the expression for volume expansion with change in temperature from the equation for length changes.
This physics video tutorial explains the concept of thermal expansion such as the linear expansion of solids such as metals and the volume contraction of liq. This physics video tutorial explains the concept of thermal expansion such as the linear expansion of solids such as metals and the volume contraction of liq. For expansion of gas V 0 and P x V is a negative quantity. The mathematical equation for an ideal gas undergoing a reversible ie no entropy generation adiabatic process can be represented by the polytropic process equation where P is pressure V is volume and for this case n g where C P being the specific heat for constant pressure C V being the specific heat for constant volume g is the adiabatic index and f is the number of.