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	Boyle's law - Wikipedia, the free encyclopedia
		Boyle's law (sometimes known as the Boyle Mariotte law) is one of the gas laws.
		Boyle's Law states that the product of the volume and pressure of a fixed quantity of an ideal gas is constant, given constant temperature.
		Boyle's law is commonly used to predict the result of introducing a change, in volume and pressure only, to the initial state of a fixed quantity of gas.
	en.wikipedia.org /wiki/Boyle's_law (484 words)

	Gas laws - Wikipedia, the free encyclopedia
		The gas laws are a set of laws that describe the relationship between thermodynamic temperature (T), pressure (P) and volume (V) of gases.
		R is the ideal gas constant (8.31 J/mol K) is the temperature in kelvins.
		The kinetic theory of gases, Graham's law of effusion and root mean square velocity all explain how individual molecules in a gas act and their relation to pressure, volume, and temperature.
	en.wikipedia.org /wiki/Gas_laws (312 words)

	Chemistry : Chapter 8 : Overview (Site not responding. Last check: 2007-10-11)
		Laws are generalized observations of experimental evidence, not explanations of why.
		Since the identity of the gas is irrelevant to the gas laws, the laws work as well for mixtures of gases as a single gas.
		Graham's law states that the rate of effusion (or diffusion) is inversely proportional to the square root of the molar mass (Equation 8.18).
	www.wwnorton.com /chemistry/overview/ch8.htm (973 words)

	Chapter 7
		Gas pressure is the result of the collisions of the particles on the walls of the container.
		Dalton's law of partial pressures: this says that, at a constant volume and temp, the total pressure of a mixture of gases is equal to the sums of the partial pressure of each individual gas in the mixture.
		The combined gas law is modified for the ideal gas law to include n = moles of gas.
	www.crnasomeday.com /chempages/chapter7.htm (695 words)

	Lesson Exchange: Independent Study Unit on the Gas Laws (Senior, Science)
		The volume of a gas is inversely proportional to the pressure on the gas.
		Since the pressure that a gas exerts is a measure of the number of molecules colliding with the sides of the container, then to increase the pressure one must do something to increase the number of collisions with the sides of the container holding the gas.
		Boyle's Law states: The volume of a definite quantity of dry gas is inversely proportional to the pressure, provided the temperature remains constant.
	www.teachers.net /lessons/posts/360.html (3237 words)

	ChemTeam: Gas Law Problems- Combined Gas Law
		What is the volume of gas at 2.00 atm and 200.0 K if its original volume was 300.0 L at 0.250 atm and 400.0 K. At conditions of 785.0 torr of pressure and 15.0 °C temperature, a gas occupies a volume of 45.5 mL.
		A gas is heated from 263.0 K to 298.0 K and the volume is increased from 24.0 liters to 35.0 liters by moving a large piston within a cylinder.
		The pressure of a gas is reduced from 1200.0 mm Hg to 850.0 mm Hg as the volume of its container is increased by moving a piston from 85.0 mL to 350.0 mL.
	dbhs.wvusd.k12.ca.us /webdocs/GasLaw/WS-Combined.html (1034 words)

	Gas Equations - Ideal gas law calculator
		In the gas phase the molecules are so energetic that they drift apart rather than connect to each other by intermolecular forces (hydrogen bonds etc.).
		The volume of a fixed mass of gas is inversely proportional to the pressure at a constant temperature.
		If we know the mass/density and the velocity of a gas, also knowing the mass/density or the velocity of a second gas, we should be able to calculate the velocity or mass/density of the second gas.
	home.c2i.net /astandne/help_htm/english/gaseq1.htm (448 words)

	[No title]
		The gas laws are a set of formulas used to calculate changes in temperature, volume or pressure.
		While there are many gas laws, these are the four most used in these calculations.
		The Combined Gas Law can be used to derive any of the three laws when one of the three variables, pressure, temperature or volume remains unchanged.
	www2.mcdaniel.edu /slm/student/521mc/christenburys/lmgaslw1.htm (474 words)

	physical behavior of matter
		A sample of gas confined to a volume of 10 liters at 273 K and 2 atm is subjected to a pressure increase of.5 atm and a temperature decrease of 10
		the volume of a gas is inversely proportional to the pressure applied on it.
		Gas samples A, B, and C are contained in a system at STP.
	www.chemcool.com /regents/physicalbehaviorofmatter/aim9.htm (1143 words)

	Gas Laws
		From this, we derive the molar volume of a gas (volume/moles of gas).
		According to Dalton's law of partial pressures, we know that the total pressure exerted on a container by several different gases, is equal to the sum of the pressures exerted on the container by each gas.
		Using the Ideal Gas Law, and comparing the pressure of one gas to the total pressure, we solve for the mole fraction.
	www.shodor.org /unchem/advanced/gas (1034 words)

	Chemistry : Chapter 8 : Gas Laws (Site not responding. Last check: 2007-10-11)
		The key to using this type of gas law is to assign the variable appropriately, paying careful attention to which variables are grouped together and the units for the variable.
		Because the ability of the molecules to escape depends on the identity of the liquid (vapor), the gas laws cannot be used to predict vapor pressure.
		To use the ideal gas law to obtain moles of hydrogen, the pressure must be partial pressure of hydrogen.
	www.wwnorton.com /chemistry/concepts/chapter8/ch8_2.htm (3544 words)

	Gases (Site not responding. Last check: 2007-10-11)
		In 1833 Thomas Graham discovered that the rate of effusion of a gas was inversely proportional to the square root of its molecular mass.
		The pressure exerted by a gas is the time averaged sum of the forces due to collisions of molecules with the walls of the container.
		Since the Combined Gas Law is derived from Boyle's and Charles's laws, it is explained by the Kinetic-Molecular theory.
	v.d.singleton.home.att.net /genchem/gases.htm (4149 words)

	Gas Laws (Site not responding. Last check: 2007-10-11)
		Boyle's Law is an example of an inverse relationship - As the pressure of a sample of gas increases, the volume decreases; as pressure decreases, volume increases.
		Charles's Law is an example of a direct relationship - As the temperature of a sample of gas increases, the volume increases; as temperature decreases, volume decreases.
		A gas sample with a volume of 3.2 liters at a pressure of 1.2 atm and a temperature of 300 K is heated to a temperature of 313 K and the volume is decreased to 1.6 liters.
	www.gmhsscience.com /problems/physgaslaws.html (1003 words)

	Gas Law Test
		Match the gas law equation with the name of the gas law on the answer sheet.
		A gas at a constant temeprature occupies a volume of 2.10 dm^3 and exerts a pressure of 98.3 kPa.
		At room temperature (21 C), the pressure of a gas is 141.
	www.msu.edu /~odonne68/portfoliogaslawtest.htm (495 words)

	Gas Laws (Site not responding. Last check: 2007-10-11)
		State and be able to use Avogadro's hypothesis and the Law of Combining Gases.
		Use the ideal gas law for calculating molar masses of gases.
		Combine gas molar masses with empirical formulas to determine molecular formulas.
	www.westminster.net /faculty/allan/Ch12_06.htm (249 words)

	Gas Laws and Gas Behavior
		He found that for a sample of gas held at a constant temperature, the pressure is inversely related to volume.
		Thus, for any sample of gas at two different sets of conditions, the quotient of the pressure times the volume, divided by the absolute temperature, is constant.
		This is a very valuable tool, as one can collect a gas generated by a reaction, record its volume, pressure, and temperature to calculate the number of moles of gas was generated in a reaction.
	academics.vmi.edu /chem_jt/CH131/gas_laws_and_gas_behavior.htm (583 words)

	Untitled Document
		A gas occupies a volume of 20 L at a pressure of 5 atm and a temperature of 500K.
		In a mixture of gases, the total pressure is equal to the sum of the partial pressures.
		Two equal volumes of gas, at the same temperature and pressure, contain the same number of molecules.
	www.mamkschools.org /mhs/science/seck/notes.htm (549 words)

	Summary of Gas Laws (Site not responding. Last check: 2007-10-11)
		We recognize this as a Boyle's Law problem because the temperature remains constant ("isothermal") and there is apparently no change in the number of moles of gas, since moles (or amount of gas in any units, for that matter), is not mentioned in the problem.
		We want the gas to expand, since we are trying to go from a volume of 3.431 L to a volume of 5.000 L. In order to let the gas expand, the pressure on it must be reduced.
		It was because of the increased pressure on the gas that it became smaller, in spite of being heated.
	www.accd.edu /pac/chemistr/lectures/gasoutline.html (4639 words)

	COMBINED GAS LAW CALCULATOR
		The above formula is the Combined Gas Law and is used when Pressure, Volume and Temperature change.
		As a practice example, 8 liters of a gas has a pressure of 760 torr and a temperature of 600 Degrees Kelvin.
		Calculate the temperature when the volume is 2 liters and the pressure is 1520 torr.
	www.1728.com /combined.htm (180 words)

	The Gas Laws (Site not responding. Last check: 2007-10-11)
		It combines the laws of Boyle, Charles and Gay-Lussac into one formula that can be used to solve for any one of the variables when the others are known.
		Specifically, the law states that the relative rates of effusion of two gases through a tube or pathway of equal size is inversely proportional to the square root of the molecular masses of the gases.
		One of the main assumptions of the kinetic molecular theory of gases is that particles of an ideal gas a.
	www.wise.k12.va.us /jjk/Chemistry/gaslaws.html (1002 words)

	The Ideal Gas Law (Site not responding. Last check: 2007-10-11)
		If we combine the three equations, we obtain the equation V = k'T/P. For one mole of gas the constant k' is called the molar gas constant and is given the symbol R.
		According to Avogadro's law, the molar volume at a specific value of T and P is a constant, independent of the nature of the gas.
		For n moles of gas the ideal gas law is represented by the equation PV = nRT.
	chemistry.twu.edu /tutorial/IdealGasLaw.html (151 words)

	Using Scientific Notation (Site not responding. Last check: 2007-10-11)
		With the combined gas law, you can sometimes get away with pressures and volumes in other units.
		With the ideal gas law, you must use the standard units for everything.
		For combined gas law problems, if the temperature stays constant, it cancels out of the equation.
	www.brazosport.cc.tx.us /~chem/tutor/gaslaw2.html (313 words)

	Group Activity: Ideal Gas Laws
		At a given constant temperature and constant pressure, the volume and mass (i.e., the number of moles, n) of a gas are directly proportional.
		It is sometimes used in double-pane windows as a filler gas because of its insulative properties.
		Calculate the pressure (in atm) exerted by 1.82 moles of the gas in a steel vessel of volume 5.43 L at 69.5°C. (Hint: solve the equation for P).
	home.gwi.net /~dakeller/Chem/Activity.Gas_Laws.html (1140 words)

	SUMMARY OF THE GAS LAWS
		Real gases behave “ideally” at ______ pressures and ________ temperatures because under those conditions, the gas particles are less likely to ______________ each other and they take up a ______________ % of the space when they occupy larger volumes.
		Estimate: The volume and number of moles of gas is constant, but the temperature decreases, therefore the pressure must also decrease.
		When a valve between a 5-L tank containing a gas at 9 atm and a 10-L tank containing a gas at 6 atm is opened, what are the new pressures of each gas?
	virtual.yosemite.cc.ca.us /chapmana/chapter5bo.htm (587 words)

	Combined Gas Law
		The Combined Gas Law is the expression obtained from mathematically combining Boyle's, Charles's and Gay-Lussac's laws.
		The mathematical form of the Combined Gas Law is:
		This module is to compute the final pressure, volume or temperature of a gas in the known initial pressure, volume and temperature and any other two final quantities.
	www.molecularsoft.com /data/help/Gas_Laws-Combined_Gas.htm (323 words)

	Chapter 10 - Gases
		Use the ideal gas equation to solve for one variable given the other three, or information from which the other variables can be calculated.
		Use the gas laws, including the combined gas law, to calculate how one variable of a gas responds to changes in one or more of the other variables.
		Calculate the molar mass of a gas, given the mass or density under specified conditions of temperature and pressure.
	www.cameron.edu /~keithv/blb10.html (404 words)

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