Determining the Molar Mass of a Volatile Liquid Purpose: The purpose of this lab was to find the molar mass of a volatile liquid. Data Table: Mass of Test Tube and Stopper (g) | 10.864 g | Barometric Pressure (mmHg) | 749.31 mmHg | Temperature of Boiling Water (C) | 97.1 C | Mass of Test Tube‚ Stopper‚ and Condensed Liquid (g) | 10.890 g | Volume of Flask (mL) | 9.90 mL | Calculations: 749.31 mmHG*1 atm760 mmHg= .98593 atm 9.90 mL*1 L1000 mL= .00990 L 97.1 C+273=370.1 K Substituting
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blue color starts to fade After heating it is completely white – color has faded – and particles are smaller due to the stirring Calculations of Trial 1: Molar Mass of H2O = 2 x (1.01) + 16.00 = 18.02gmol1- How many moles of H2O evaporated Trial 1: 0.72g±0.04g/18.02gmol1- = 0.03995… ≈ 0.040mol±6.25% = 0.040mol±0.003mol Molar Mass of CuSO4 Cu: 63.55 gmol1- S=32.07 gmol1- O x 4= (16.00) x 4=64.00 gmol1- CuSO4= 159.62 gmol1- Moles of anhydrous part (CuSO4) 1.35g±0.02g/159.62 gmol1-=0
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LESSON 3: MOLAR VOLUME QUESTIONS 1. Calculate the density of the least dense gas‚ hydrogen‚ at 25⁰C and 101.3kPa. [0.083g/L] 2. Calculate the density of the densest gas‚ uranium (VI) fluoride (UF6) at 70⁰C and 25.0kPa. [3.09 g/L] 3. An unknown monoatomic gas X has a density of 5.37g/L at 25⁰C and 101.3kPa. Calculate the molar mass of the gas and determine its identity. [ 131.028g/mol; Xe] 4. Calculate the density of ammonia gas in grams per litre at 18⁰C and 100.4kPa. [0.706g/L] SCH3U0 Gases
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Determining the Absorbance Maximum Wavelength and Molar Extinction Coefficient to Find the Molarity of the Unknown DCPIP Background Information: A spectrophotometer is an instrument used to help determine the absorption spectrum of chemicals. It does this by reading the absorbance of the chemical at different wavelengths. All chemicals absorb light in their own distinct way. This distinction helps to identify unknown chemicals. The absorption of light within a chemical is also very important because
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Title: Specific Heat of Solids II. Object: To determine the specific heat capacity of solids by methods of mixtures. III. Theory: When to or more substances at different temperatures are mixed‚ heat will flow from the substance of higher temperature to the substance of lower temperature. The heat flow will continue until equilibrium in temperature is reached. From the Law of Conservation of Energy‚ whatever amount of heat is lost by the hot substance must be equal to the heat gained by the cold
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Specific Heat of a Metal Post-Lab I. Purpose The purpose of this lab is to determine the specific heat of an unknown metal. II. Safety Wear goggles and lab apron at all times. Use caution when boiling water. Do not pick up hot beaker or hot metal with hands. Use tongs. III. Pre-Lab Questions 1. A 12.5 g metal is raised to 100C in boiling water. It is put into 82.8 g of water at 22.4C‚ and the water rises to 28.6C. Recalling that the specific heat of water is 4.18J/gC‚ use the equation above
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7/16/12 Heat of Fusion Heat of Fusion for Ice Introduction: This lab report is a step by step process in calculating the heat of fusion for ice and to compare the differences between salt added to room temperature water and salt added to icy water. To calculate heat of fusion‚ one must understand heat of fusion. Heat of fusion is the amount of heat required to convert a mass of a solid at its melting point into a liquid without an increase in temperature. As difficult as this may sound‚
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overall heat transfer coefficient on the outer surface of the covered pipe is 10 W/m2.K. if the velocity of the steam is 10 m/s‚ at what point along the pipe will the steam begin condensing and what distance will be required for the steam to reach a mean temperature of 100 oC? Question 2: Consider a horizontal‚ thin walled circular tube of diameter D = 0.025 m submerge in a container of n-octadecane (paraffin)‚ which is used to store thermal energy. As hot water flows through the tube‚ heat is
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Heat and Energy Transfer Lab Materials needed: Part 1: bowls (not included in the lab kit; use cooking pots or plastic containers- something large enough to fit your hand) ice (not included in the lab kit) thermometers Part 2 test tubes – use three similar glasses or cups water various household materials for insulation stove or microwave to heat up water Part 1: Heat transfer and human sensation 1. Pour warm water in the bowl on the left‚ cold water in the bowl on the right‚
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Investigation 11 Specific heat capacity Aim: Investigate to determine the specific heat capacity of a metal cube provided Apparatus: -thermometer -stirrer -water -calorimeter -beam balance -metal cube -beaker Procedure: Using the normal equipment for Thermal Physics investigations‚ you are required to design and carry out an investigation to determine the specific heat capacity of a metal cube provide by teacher. Furthermore‚ you will need to compare your obtained value with
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