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Carbon monoxide

chemistry

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Chemistry
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Chemistry
Chemical bonding
Inorganic solvents
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Properties of water
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Chemical bond
Carbon monoxide
Hydrogen bond
Hydrogen

AP Chemistry Final Exam Version P Fall 2005 3 Free Response questions, 45 minutes CALCULATORS MAY BE USED. You will also have a periodic table, equation sheets, and the standard reduction potential table. Clearly show the method used and the steps involved in arriving at your answers. It is to your advantage to do this, since you may obtain partial credit if you do and you will receive little or no credit if you do not. Attention should be paid to significant figures. Note: For all questions, assume that the temperature is 298 K, the pressure is 1.00 atmospheres, and solutions are aqueous unless otherwise specified. Record all your work on this exam; you will only be given credit for answers showing work. NAME: PERIOD: 1 2 3 4 January 10-12, 2006

Bond Enthalpy

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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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