The vapor pressure of the liquid is equal to the partial pressure of its vapor in the container. The book contains 14 lab activities dealing with various aspects of forensic science. Prepare the computer for data collection by opening the file 09 evaporation from the chemistry with vernier folder. Quick and easy calibration using verniers software. In this experiment, our chemistry staff scientist, melissa hill, phd, studies temperature changes caused by the evaporation of two alcohols and relates the temperature changes to the strength of. Wrap probe 1 and probe 2 with square pieces of filter paper secured by small rubber bands as shown in figure 1. Evaporation occurs when the probe is removed from the liquidos container. Investigating the contents of unlabeled containers based on vernier chemistry ap lab 6. Computer 9 evaporation and intermolecular attractions.
Experiments cover a broad range of topics and techniques including compound identification, synthesis, chromatography, optical rotation and spectroscopy. Adapted from experiment 09, evaporation and intermolecular attractions, from the chemistry with vernier lab book. In this experiment, you will investigate factors that determine strengths of intermolecular forces of attraction in alkanes and alcohols and the magnitudes of the. The experiments involve characterisation of reactions and compounds using the vernier melt station, mini gas chromatograph, spectrovis plus, and the polarimeter. Evaporation and intermolecular forces in this experiment, temperature probes are placed in various liquids. Explaination of how to use the template for writing up the lab on evaporation and intermolecular forces. Organic chemistry with vernier scientrific pty ltd. Solution formation results in a negligible change in enthalpy. Gas chromatography and intermolecular forces you know from your studies that structure plays an important part in the strength of intermolecular forces such as hydrogen bonding, dipole forces and dispersion forces. Eventually, if sufficient liquid is present, equilibrium is reached between the rate of evaporation and the rate of condensation. Evaporation and intermolecular attractions chemistry with calculators 9 3 8.
Dishwashing detergent lab report 048230 uts studocu. A similar lab is contained in the pasco chemistry materials. Determine the formula of a compound by measuring the stoichiometry of the reaction of that compound with known reagents. Evaporation and intermolecular attractions chemistry with vernier experiment 9 6 prelab exercise prior to doing the experiment, complete the prelab table. Programs, followed by vernier software and finally logger pro. This has many applications in chemistry, biology and environmental science. The magnitude of a temperature decrease is, like viscosity and boiling temperature, related to the strength of intermolecular forces of attraction. In this experiment, temperature probes are placed in various liquids. Be sure there are no open flames in the lab during this experiment. Before coming to lab, you should be able to draw lewis structures for all six compounds to be used and you should know the compounds molecular weights.
Draw a structural formula for a molecule of each compound. Unlike the cobalt complex, where both enantiomers can be. Ninth grade lesson freezing point determination betterlesson. Get free experiments, innovative lab ideas, product announcements, software updates, workshops schedule, and grant.
Ninth grade lesson evaporation of alcohols betterlesson. Intermolecular forces are observable at the bulk scale using physical properties of. Get free experiments, innovative lab ideas, product announcements, software updates, workshops schedule, and grant resources. There are fantastic interactive molecular building tools by phet. This book makes it easy for organic chemistry instructors to integrate vernier datacollection technology into then organic chemistry lab curriculum. Evaporation and intermolecular attractions vernier software yumpu. Evaporation and intermolecular attractions vernier. The vapor pressure of the liquid is dependent on the temperature and the strength of the intermolecular forces.
The connection ports are at the bottom of the calculator and lab pro. Hydrogen bonding the almighty weak bond introduction intermolecular forces describe interactions between different molecules and play an important role in determining the physical properties of a substance. Evaporation and intermolecular attractions analyze cooling effect of evaporation to compare the strength of attractive forces between molecules. First, it helps students clarify through a handson investigation the difference between intramolecular forces covalent bonds, in this case and intermolecular forces polarpolar and london dispersion forces, in this case. Identifying an unknown and carolina types of chemical bonds occasionally, despite the best efforts of the most meticulous workers in a chemistry lab. This software works well for all of our sensors except for the spectrometer or the thermocouple. Vapor pressure and heat of vaporization lab report. Open the loggerpro software and set it up to acquire temperature data with the vernier temperature probe. Laboratory extends content, emphasizing critical thinking and safety. In this experiment, you will study temperature changes caused by the evaporation of several liquids. In this experiment, our chemistry staff scientist, melissa hill, phd, studies temperature.
Evaporation andintermolecular attractionscomputer9in this experiment, temperature probes are placed in various liquids. Zoom in to see how different sugar and salt compounds dissolve. Getting to know handson experiments all experiments use. Evaporation occurs when the probe is removed from the liquids container. Use differences in intermolecular forces to separate a mixture into its components or to determine the identity of components of a mixture.
Plastic water bottle, plastic ruler or plastic pen wool or cotton fabric or you can use the hair on your head. The vernier conductivity probe determines the ionic content of an aqueous solution by measuring its conductivity. Relate the temperature changes to the strength of intermolecular forces of attraction. This class is intended to cover the same amount of material one would expect in a year of freshman college chemistry. Chemistry with vernier 9 1 evaporation and intermolecular attractions. Evaporation and intermolecular attractions youtube. Intermolecular forces are forces that act between molecules rather than interamolecular forces which act within a molecule. Using a melting point apparatus, determine melting temperatures for the. You should also read the section in your textbook to clarify the differences between hydrogen bonding and dispersion forces. A video showing the use of vernier sensors with our sparkvue software and app is shown at the link below.
Intermolecular forces 1 team members print and sign name by role analyst 1. After the probes have been in the liquids for at least 3 0 seconds, select start to. Our district has chosen to focus on phases of matter in our unit on intermolecular forces. How do i use my vernier sensors with a pasco interface and pasco software datastudio, sparkvue, sparkvue hd, or with the xplorer glx and spark sls, or pasco capstone. Vapor pressure and heat of vaporization lab report help. Pearson baccalaureate catrin brown mike ford chemistry higher level. Experiment 5 freezing point depression outcomes after completing this experiment, the student should be able to. Instructor notes include helpful tips for successfully completing the experiment. In this experiment, you will study temperature changes caused by the evaporation of several liquids and relate the temperature changes to the strength of intermolecular forces of attraction.
In this lesson, students will use vernier probeware to measure the change in. Intermolecular forces with evaporation of alcohols using go direct. Gas chromatography and intermolecular forces organic. This evaporation is an endothermic process that results in a temperature decrease.
The relationship between vapor pressure of a volatile liquid and temperature is explored using the pressure sensor. Wear safety goggles and lab apron at all times in lab. Pour in sugar, shake in salt, and evaporate water to see the effects on concentration and conductivity. The rate of the temperature decrease is, like viscosity and boiling. Chemistry with calculators by dan holmquist, jack randall and daniel volz. In this experiment, you will collect and analyze gc data from various samples. Properties of gases, volatile liquids, temperature effect on vapor pressure description. Calculate the enthalpy of vaporization of various compounds from gc temperature dependent data. Take into account various intermolecular forces in these two liquids. Evaporation and intermolecular attractions vernier software. Choose from over 1,000 well tested, readytouse experiments designed to help you integrate probeware into your curriculum. In turn, the strength of such forces influences physical properties such as phase change temperature, the energy required to complete a. Intermolecular forces between solvent and solute in such solutions are very weak. Entropy and free energy are used to understand spontaneous chemical processes.
The melting temperature of pure compounds is a measure of the intermolecular forces that hold the solid together. To examine the relationships between structure, intermolecular forces and polarity. Lab4 chem 1112 general chemistry ii laboratory laboratory. In this experiment, you will investigate factors that determine strengths of intermolecular forces of. Analyze cooling effect of evaporation to compare the strength of attractive forces between molecules. For sample answers to the questions in this lab, please contact vernier software and. Investigating intermolecular forces using the mini gc plus vernier. Chem 1112 general chemistry ii laboratory page 1 laboratory 4. Each lab is preceded by a short scenario that introduces the concepts or methods to be. Intermolecular forces with evaporation of alcohols using.
Identify an unknown sample based on its enthalpy of vaporization using values calculated from known standards. Therefore, it is a much faster pace than that which you may be accustomed. The latest version of logger lite software can be downloaded from the vernier website for free. If the temperature probe is not automatically identified. The evaporation of a volatile liquid from the surface of a temperature probe is an endothermic process that results in a temperature decrease. Objectives in this experiment, you will study temperature changes caused by the evaporation of several liquids.
Organic chemistry with vernier organic chemistry with vernier is a lab book containing experiments designed for use with vernier datacollection technology in tertiary organic chemistry courses. In this experiment, you will study temperature changes caused by the evaporation of two alcohols and relate the. Second, it gives students the opportunity to work with chromatography beyond the simple paper chromatograph usually. Then determine the molecular weight of each of the molecules. The original lesson plan which comes from vernier, the maker of the probeware we use in the laboratory is do both the freezing and melting point of water in the same class. Prepare 2 pieces of masking tape, each about 10cm long, to be used to tape the probes in position during step 9. The entire full year high school chemistry course bundled into one, convenient digital download. In this lesson, students will use vernier probeware to measure the change in temperature resulting from the evaporation of different alcohols.
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