experiment, the magnesium metal will be reacted with concentrated hydrochloric acid to produce hydrogen gas according to the following chemical equation: Mg (sol) + x HCl (aq) → MgCl x (aq) + x H2 (gas) 2 The hydrogen gas produced will be collected, its volume measured, and the mass in grams calculated using the ideal gas law: PV = nRT When using this equation, the units of the gas constant (R) must be consistent with the units used for the other quantities in the equation. The Handbook
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Chapter 17 9 TF TC 32 5 TC 5 TF 32 9 (17.1) (17.2) TK TC 273.15 (17.3) T2 p2 T1 p1 constant-volume gas thermometer, T L L0 T V V0 T in kelvins (17.4) linear thermal expansion for solids volume thermal expansion for liquids of mass m (17.6) (17.12) (17.13) (17.18) (17.20) Q mc T Q nC T heat required for temperature change T heat required for temperature change of n moles heat transfer in a phase change
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ideal gas, DU = 0 ; DH = 0 ; thus heat and work are equal and given by: P2 q = w = n R T1 LogA ÅÅÅÅÅÅÅ E J ê. subs P1 -23330.9 J 16 Notes on Gaskell Text ü 2. Reversible Adiabatic Expansion In an adiabatic expansion q = 0; and P V g is a constant. Thus the final state has 1êg g P2 V2 i P1 V1 y Å ; T2 = ÅÅÅÅÅÅÅÅÅÅÅÅÅ ê. g -> 5 ê 3 Å V2 = j ÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅ z j z n Rla k P2 { P1 V 1 P2 I ÅÅÅÅÅÅÅÅÅÅÅÅÅ M P ÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅ2 ÅÅÅÅÅÅÅÅÅ ÅÅÅÅÅÅÅÅ Å n Rla 5ê3 3ê5 For an ideal gas cv = 3R/2;
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PASS MOCK EXAM – FOR PRACTICE ONLY Course: __CHEM 1001 A/T___ Facilitator: _Saumya Bansal____ Dates and locations of mock exam take-up: Wednesday 4 – 5 30 (SA 502) Wednesday 6 30 – 8 (ME 3269) , Extra session maybe on Thursday (details in class) IMPORTANT: It is most beneficial to you to write this mock midterm UNDER EXAM CONDITIONS. This means: 1. • Complete the midterm in __1.5_ hour(s). 2. • Work on your own. 3. • Keep your notes and textbook closed.
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What makes the ball curve: Soccer players can make the ball curve by applying a Force, kicking, to the ball that is not in the center of the ball itself. When the ball is struck on the side by a player the ball spins while it is moving forward. In the case of the picture below, the soccer ball was struck on the right side of the ball and is spinning counter-clockwise. What causes the ball to actually curve in the air is a difference in the pressures on either side of the soccer ball. On the left
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Universal Gas Constant * What are the four measurable properties of gases? Temperature, volume, moles, pressure. * R is the universal gas constant that relate the four properties of gases in one relationship. Write down the formula equal to R. PV = R nT * What is the unit that you used for R? Atm.L\k.mol * Hydrogen gas has properties very nearly like an ideal gas. Write down the equation for the production of H2 gas Mg(s) + 2HCl(aq)
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specific volume of the saturated liquid, vf = 0.0008580 m3/kg at 900 kPa. We can then find the mass as follows. We can now compute V2 = mv2 and find the work done. W = 5,571 kJ 2 A mass of 2.4 kg of air at 150 kPa and 12oC is contained in a gas-tight, frictionless piston-cylinder device. The air is now compressed to a final pressure of 600 kPa. During the process, heat is transferred from the air such that the temperature inside
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of ideal gas. Tasks: 1) To learn the Kleman – Dezorm method; 2) To determine the rate of adiabat for air using the Kleman – Dezorm method. Experiment To define the adiabat of the air [pic] in this work it is used the classical Kleman – Dezorm method. Initially, the system (gas) is in state 1, which is characterized by thermodynamic parameters: temperature T1, pressure p1 and specific volume v1 (volume of unit of mass of gas). Making the adiabatic expansion process gas transfers
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[pic] |College of Engineering and Computer Science Mechanical Engineering Department Mechanical Engineering 370 Thermodynamics | | | |Fall 2010 Course Number: 14319 Instructor: Larry Caretto | Unit Two Homework Solutions, September 9, 2010 1 A frictionless piston-cylinder device initially contains 200 L of saturated liquid refrigerant-134a. The piston is free to move, and its mass is such that it maintains a pressure
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exist as a gas at ordinary temperatures. The characteristics of gases include: assuming the volume/shape of their containers, most compressible of the states of matter, will mix evenly/completely when confined in the same container, lower densities than liquids and solids. 5.2: Pressure of A Gas Gas molecules are constantly in motion, causing them to exert pressure with the surfaces they come in contact with. Pressure is known as the most readily measurable properties of a gas. SI Units
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