Physio Chem 150 Study Guide Week Three
Physio Chem 150 Study Guide Week Three Chem 150
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This 5 page Study Guide was uploaded by Brianna S. on Thursday September 8, 2016. The Study Guide belongs to Chem 150 at Xavier University taught by Dr. Stroud in Fall 2016. Since its upload, it has received 47 views. For similar materials see Physiological Chemistry in Chemistry at Xavier University.
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Date Created: 09/08/16
Physiological Chemistry 150 Lecture: Week Three 09/05-09/09 2016 Study Guide Matching: A. Chemical Mass / volume B. Potential Energy Anything that has mass and takes up space; composed of atoms C. Density Substances that have a composition and properties; made by chemists D. Kinetic Energy Stored energy used at a later time E. Heterogeneous mixture The study of matter and the changes it undergoes F. Chemistry Contains two or more elements in a definite ratio G. Compound Energy of motion H. Matter Lacks uniformity; different parts are visible I. Physical Change New color, formation of gas, irreversible formation of a solid precipitate and release or absorption of heat J. Element Color, size, solubility, density, temperature, mass, state of matter, smell, texture, shape K. Indicators of a chemical change Alters the state or form of matter but not its content or composition L. Physical Properties Simplest form of a substance 1. What are the four components of the Scientific Method? 2. List important metric units for mass, length, volume, time and temperature. Examples: 1kg = 2.20lbs, 1m = 1.09 yd, 1L =1.06 qt, 1h = 60min 3. Name how many significant figures are in each number a. 1,500g b. 20,302mcg c. 1 billion dollars d. 0.0034m e. 0.00000629mm 4. Convert the numbers in question 3 using scientific notation. 5. When do you use conversion factors? And what is the general format? 6. A dessert contains 137.25g of vanilla ice cream, 84g of fudge sauce and 43.7g of nuts. a. What is the total mass, in grams, of the dessert? b. What is the total weight, in pounds, of the dessert? 7. Ethanol has a density of 0.79g/mL. What is the volume, in quarts, of 1.50kg of alcohol? 8. What are the four categories that matter can be divided into? Give an example of each. 9. Name the seven diatomic elements. 10. ***Answer with pure substance, mixture, element, and compound— also state whether the mixtures are homogenous or heterogeneous, as well as, label the diatomic elements ***More than one answer is needed for some questions 1) Shampoo 2) Nitrogen 3) Hydrogen peroxide 4) Plain Greek yogurt 5) Helium 6) H 2 7) Chalk 8) Blueberry bagel 9) Aluminum foil 11. Show the formulas for how to convert heat in Celsius, Fahrenheit and Kelvin. 12. Determine energy values for different foods (round to the tenths place) a. The total kilojoules in two tablespoons of crunchy peanut butter that contains 6g of carbs, 16g of fat and 7g of protein. b. The kilocalories in one can of cola if it has 40g of carbs and no fat or protein c. The total kilocalories for a diet that consists of 68g of carbs, 9g of fat and 150g of protein. 13. What is the difference between Specific Heat (SH) and Heat of Fusion? Show the formulas. 14. Use the heat equation to calculate energy for each of the following: a. calories to heat 8.5g of water from 15 degrees Celsius to 36 degrees Celsius b. Joules to heat 75g of water from 22 degrees Celsius to 66 degrees Celsius c. Kilojoules to heat 175g of copper from 28 degrees Celsius to 188 degrees Celsius 15. Identify each of the following changes in state as melting, freezing, sublimation or deposition: a. Snow on the ground turns to liquid water b. Ice cream is freeze-dried c. Water turns to ice to create the ice skating rink floor d. Frost (ice) forms on the walls of the freezer 16. In one box of nails, there are 75 i3on nails weighing 0.250lb. The density of iron is 7.86g/cm . The specific heat of iron is 0.452J/g x degrees Celsius. The melting point for iron is 1535 degrees Celsius. The heat of fusion for iron is 272J/g. a. What is the volume, in cm , of the iron nails in the box? b. If 30 nails are added to a graduated cylinder containing 17.6mL of water, what is the new level of water, in mL, in the cylinder? c. How much heat, in joules, must be added to the nails in the box to raise their temperature form 16 degrees Celsius to 125 degrees Celsius? d. How much heat, in joules, is required to heat one nail from 25 degrees Celsius to its melting point and change it to liquid iron? Cited: The written problems were used from the textbook, Chemistry: An Introduction to General, Organic and Biological Chemistry, 12 th edition, written by Karen C. Timberlake and published by Pearson. * Some of the answers to the problems are located in the book for reference
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