Boyle’s law

	Gas laws
	Boyle’s law
	Introduction    Boyle’s law is a quantitative relationship between volume and pressure of a gas at constant temperature.    Statement    "The volume of a given mass of a gas is inversely proportional to pressure if temperature remains      constant ". Mathematical representation of Boyle’s law
	According to Boyle’s law V µ 1/P V= (constant)(1/P) PV=constant At P1 pressure P1V1 = constant ------------------(1) At P2 pressure P2V2 = constant ------------------(2) Comparing (1) & ( 2) P1V1 = P2V2 .
	Second statement    "At constant temperature, the product of pressure and volume of a gas remains constant "
	Graphical representation of Boyle’s law    Graph between P & V at constant temperature is a smooth curve known as "parabola"
	Graph between 1/P & V at constant temperature is a straight line.
	Charles law
	Introduction
	It is quantitative relation between volume and absolute temperature of a gas at constant pressure.
	Statement
	"The volume of a given mass of a gas at constant pressure is directly proportional to absolute    temperature"
	Second statement
	"The volume of a given mass of a gas increases or decreases by 1/273 times of it’s original    volume at 0 0C for every degree fall or rise of temperature at given pressure."
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	Mathematical representation
	Let the volume of a gas at T Kelvin is V Then according to Charles’s law V µ T V = (constant) T V/T = constant At T1 k V1/T1 = k ---------------(1) At T2 k V2/T2 = k ---------------(2) Thus V1/T1 = V2/T2
	Third statement
	By using above equation ,Charles’s law can also be stated as:    "The ratio of volume to absolute temperature of a gas at given pressure is always constant"    Graphical representation    Graph between Volume and absolute temperature of a gas at constant pressure is a "straight line"
	Absolute scale of temperature or absolute zero
	If the graph between V and T is extra plotted, it intersects T-axis at -273.16 0C At -273.16 0C volume of    any gas theoretically becomes zero as indicated by the graph.
	But practically volume of a gas can never become zero. Actually no gas can achieve the lowest possible    temperature and before -273.16 0C all gases are condensed to liquid. This temperature is referred to as    absolute scale or absolute zero. At -273.16 0C all molecular motions are ceased.