Background: Gasses have neither a defined shape nor volume, and as such are very sensitive to temperature and pressure. To relate these, there is a law of Chemistry called the Ideal Gas Law. “A gas is said to be “idea” if it behaves exactly as predicted”. This is expressed as PV=nRT, relating pressure, volume, number of moles, a constant value, and the temperature. It was built from several preceding laws. These would be Boyle’s Law, P1V1 = P2V2, Charles’s
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College Pressures College is an institution with the purpose of preparing adults for their specific disciplines. Sometimes a college diploma is a guarantee of good jobs and a better future. Today, young adults in college often experience a lot of pressure. The journalist and professor at Yale University, William Zinsser, discusses the pressures and stress with lots of details and reasons in his persuasive and informative essay entitled College Pressures. His essay was directed to parents of college
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Kinetic-molecular theory (melting, vaporization & vapor pressure) 3 General Properties of Gases Properties of Gases • There is a lot of “free” space in gases • Gases can be expanded infinitely • Gases occupy containers uniformly & completely • Gases diffuse & mix rapidly Gas properties can be modeled using math which depends on: • V = volume of the gas (L or dm3) • T = temperature (K) • n = amount (mol) • P = pressure (atm) 5 FHSC1114 Physical Chemistry 4 6
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to the present system. A detailed ventilation survey was carried out by measuring the variations of airflow, pressure drop and humidity differences along four levels of the mine (i.e. 565ft, 805ft, and 965ft and 1132ft levels) and compared with the corresponding standard values which describe the lowest conditions to be met for working underground. The distributions of airflows, pressures and humidity in each level could be detailed on graphs and the areas where the additional air supplies were identified
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Physics Presentation - Egg in a Bottle Title of Experiment: Egg in a Bottle Physics Theory: Air Pressure Materials: Hard-boiled egg without shell Glass bottle with opening slightly smaller than the diameter of the egg Piece of paper Matches for fire Procedure: 1. Put the bottle on the table and light the piece of paper on fire with the match 2. Drop the lit paper in the bottle to fall at the bottom of the glass bottle 3. Set the egg on top of the bottle with
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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 of Chemistry and Physics lists the value of R as R = 0.08206 L × atm × mol –1 –1 ×K Thus, pressure (P) must be expressed in atmospheres, volume (V) in liters, and temperature (T) in Kelvin. 11A Experiment A sample of magnesium metal with an approximate mass of 0.24 grams will be reacted with excess hydrochloric acid. The hydrogen gas produced
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saturation for pressure measurement You must write up this work in the form of a report and submit to lab assistant in two weeks to receive feedback. Name: Std. No: Equipment (per group) Number 1 2 3 4 5 Item Armfield TH3-A/B/G Saturation Pressure Apparatus Armfield TH3-A/B/G Saturation Pressure Apparatus Electric Console 500 ml Beaker PC with TH3 software Stopwatch Learning Outcomes 1 2 3 4 Learning Outcome To understand principles of saturation pressure measurement
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Answer Key – Chapter 7 7.1 How many grams of solute are present in the following solutions? a) 25.2 g of a 4.25 % w/w solution of glucose 25.2 g solution x 4.25 g solute = 1.07 g solute 100 g solution b) 125 g of a 6.55% w/w solution of sodium sulfate 125 g solution x 6.55 g solute = 8.19 g solute 100 g solution 7.3 How many grams of KHCO3 must you add to 250 mL of water to prepare a 0.600% w/v solution? 0.600% w/v solution means grams of
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absolute pressure there? 3. What is the smallest temperature in degrees Celsius you can have? Kelvin? 4. The “standard” acceleration (at sea level and 45° latitude) due to gravity is 9.80665 m/s2. What is the force needed to hold a mass of 2 kg at rest in this gravitational field? How much mass can a force of 1 N support? 5. A gasoline line is connected to a pressure gage through a double-U manometer as shown in the figure. If the reading of the pressure gage is 370 kPa, determine the gage pressure of
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------------------------------------------------- My ------------------------------------------------- Portfolio ------------------------------------------------- Submitted by: ------------------------------------------------- Burlas,Jolina R. III-Dao ------------------------------------------------- Submitted to: ------------------------------------------------- Waperi,Evelyn P. ------------------------------------------------- -------------------------------------------------
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