atoms/ions in a chemical formula. They are the small numbers within the chemical formula. They tell how many individual atoms/ions are present. 2. State the Law of Conservation of Mass and explain its relationship to stoichiometry. The Law of Conservation of Mass states that “Matter can neither be created nor destroyed during a chemical reaction.” This law is dictates the necessity for balancing a chemical equation with coefficients; if we didn’t balance equations‚ we would be created and/or destroying
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Chapter 6 – Properties of gases lecture notes 1. Gas phase Gases have neither definite shape or volume 1) volume changes with pressure 2) volume changes with temperature 3) gases are miscible 4) gases are generally MUCH less dense than liquids 2. Atmospheric pressure 1 atm = 760 torr (mm of Hg) F= ma F = force m = mass a = acceleration P = F/A - ma/A P = pressure
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dynamic method to measure the ratio of the specific heat capacities of air and‚ in the second‚ you will investigate the behaviour of gas undergoing an expansion that is approximately adiabatic and ‘partially reversible’ – somewhere between the two limits of a completely irreversible (free) and perfectly reversible expansion. The air can be considered an ideal gas. DESCRIPTION AND EXPERIMENTAL PROCEDURE PART I: Determination of γ for Air Motion of Steel ball steel ball R Tap ubber mat The
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formulas and also chemical reactions. In this experiment hydrogen gas will be produced from the reaction of a known mass of magnesium metal with an excess of hydrochloric acid. The theoretical number of moles of hydrogen gas may be calculated using stoichiometry and the balanced chemical equation. The theoretical volume of hydrogen gas may then be determined from the previously determined number of moles of gas by rearranging the ideal gas law to solve for volume at the experimental conditions of temperature
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experiment is to conduct different experiments that will illustrate the different gas laws. We will be given a list of equipment need to perform the experiment as well as general rules to help us do the experiment. We will investigate three properties of gases pressure‚ temperature‚ and volume. By doing this experiment we will be able to define the gas laws. According to Boyles‚ it states that a fixed amount of ideal gas that is kept at a fixed temperature‚ that the pressure and volume are inversely
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Theory: An ideal gas obeys the equation of state that the pressure‚ specific volume or density‚ and absolute temperature with mass of molecule and the gas constant‚ R. PV = mRTM Where‚ P = Absolute pressure V = Volume n = Amount of substance (moles) R = Ideal gas constant T = Absolute temperature (K) However‚ real gas does not absolutely obey the equation of state. A few changes on the ideal gas equation of state allow its application in the properties of real gas. When energy
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I O N B Answer at least TWO (2) Questions from this Section 4. (a) (i) What is an ideal gas? (2 marks) (ii) Write the ideal gas equation and give the units used for each term in the equation when R = 0.0821L-atm/mol-K. (3 marks) (b) Why was this equation modified and what is the modified form of the equation? (5 marks) (c) Calculate‚ using the modified equation‚ the pressure at which one mole of chlorine gas will occupy 22400 cm3 at 0oC. (For chlorine‚ a = 6.49 L2-atm/mol and b = 0.0562L/mol
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Topic 1.2 AMOUNT OF SUBSTANCE The mole Reacting masses and atom economy Solutions and titrations The ideal gas equation Empirical and molecular formulae Ionic equations Mill Hill County High School THE MOLE Since atoms are so small‚ any sensible laboratory quantity of substance must contain a huge number of atoms: 1 litre of water contains 3.3 x 1025 molecules. 1 gram of magnesium contains 2.5 x 1022 atoms. 100 cm3 of oxygen contains 2.5 x
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LESSON 05.01 Wood blocks- solid Hammer- solid Lightning- plasma Fluorescent light bulb- plasma Steam and helium filled balloon is gas Water from a faucet and swimming pool is liquid - Can be distinguished at the molecular level by how the particles are held together - The phase of matter is considered a physical property because a change in a substance’s phase does not change the chemical properties or identity of the substance. - The phases of matter are determined by the kinetic energy
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projected problems and requests your assistance on the particular one described below. Decades from now‚ the present method of supplying energy to households (i.e.‚ with electricity‚ gas‚ or o11) may not be possible. Instead‚ housepersons will shop for their energy in supermarkets (Figure P4.5). Cyhnders of gas (let us ? +llh ’ I Figure P4.5 assume that the cylinders contain air) may be purchased and connected to any number of Carnot engines or other such efficient devices to be
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