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Supramolecular chemistry

quiz 2

Subject: 
Biology
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Inorganic solvents
Oxides
Physical chemistry
Chemical bonding
Supramolecular chemistry
Properties of water
Solution
Chemistry
Chemical bond
Hydrogen bond
water
Benzene

Magnesium has 12 protons. How many electrons are in its second energy level? a. 2 b. 4 c. 6 d. 8 e.10 Which of the following statements correctly describes any chemical reaction that has reached equilibrium? a. The concentration of products equals the concentration of reactants. b. Both forward and reverse reactions have halted. c. The rate of the forward reaction equals the rate of the reverse reaction. d. The reaction is now irreversible e. No reactants remain.

BIO CH 2 TEST

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Biology
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Chemical bonding
Chemical properties
Chemistry
Quantum chemistry
Supramolecular chemistry
Chemical bond
Valence
Proton
Ionic bonding
Covalent bond
Hydrogen bond
Atom

Campbell's Biology, 9e (Reece et al.) Chapter 2 The Chemical Context of Life This chapter presents basic chemical principles for understanding the chemical context of living organisms, from atomic structure to the nature of chemical bonds and an introduction to chemical equilibrium. These questions focus on elements most important to life or the study of life, including the elements that comprise organic molecules and important trace elements. Some isotopes are important in geologic dating and in biological tracer studies. How elements participate in forming different types of chemical bonds is essential to mastering subsequent topics on the behavior and properties of biological molecules, structures, and energy metabolism. Multiple-Choice Questions

water

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Biology
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Chemistry
Inorganic solvents
Oxides
Supramolecular chemistry
Physical chemistry
Chemical bonding
Properties of water
water
Solution
Micelle
Hydrogen bond
Hydrogen

1 LECTURE 2: Water Hydrogen oxide Dihydrogen monoxide Hydrogen hydroxide Course outline - Water ? Structure of water ? Solvent Properties ? pH properties ? Temp. Regulation ? Heat capacity ? Heat of fusion ? Heat of vapourization ? Surface Tension ? Capillarity BL10J HALL 2006 2 Objectives ? At the end of this lesson you should be able to: ? Describe the structure of the water molecule ? Describe how water molecules are affected by ? pH, Temperature, Surface tension, Capillarity ? Explain the properties of water that make it an effective solvent. BL10J HALL 2006 3 BL10J HALL 2006 4 Water ? Abundant on earth. ? Covers 3/4 of the earth?s surface ? 70% of our body weight. ? Makes life possible.

CHEM 1A midterm 1

Subject: 
Chemistry
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Chemistry
DuPont
Synthetic fibers
Reducing agents
Hydrogen bond
Supramolecular chemistry
Kevlar
Properties of water
Hydrogen
Formamide
Formic acid
Nylon
Technology

Chemistry 1A, Fall 2011 Midterm Exam #1 September 20, 2011 (90 min, closed book) Name:__________________________________ SID:___________________________________ GSI Name:________________ ? The test consists of 4 short answer questions and 18 multiple choice questions. ? Put your written answers in the boxes provided. Answers outside the boxes may not be considered in grading. ? Write your name on every page of the exam. Question Page Points Score Multiple Choice (1-18) 2-7 55 Formic acid Short Answer 3 8 Hydrogen Storage Short Answer 3 4 Capsaicin Short Answer 5 4 Rubber Short Answer 7 4 Total 75 Useful Equations and Constants: PV = nRT

Bond Enthalpy

Subject: 
Chemistry
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Chemistry
Chemical bonding
Hydrogen bond
Supramolecular chemistry
Bond-dissociation energy
Carbon monoxide

? John Erickson, 2005 WS16-2BondEnergy example H2 (g) + F2 (g) ? 2HF ?Hrxn = [energy used for breaking bonds] ? [energy formed in making bonds] [436 kJ/mol + 155 kJ/mol] ? [2(567 kJ/mol)] = ? 543 kJ/mol Bond energy is defined as the amount of energy required to break a bond. These values are positive, indicating that bond breaking is endothermic. Bond energies are reported in kilojoules per mole (kJ/mol). The energy for breaking a hydrogen-hydrogen bond is 436 kJ/mol so when a hydrogen-hydrogen bond is formed the process releases 436 kJ/mol. In a chemical reaction several bonds are broken and formed. For example in the reaction below a hydrogen-hydrogen bond is broken and a fluorine-fluorine bond is broken.
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