# thermochemical-equations-answers - 10CaO(s 10H 2 O(l →...

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Thermochemical equations

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Answers C + O 2 CO 2 393.5 kJ 2HI 53.2 kJ H 2 + I 2
Answers pg. 175, Q 5.45-5.50 5.45 - At STP (25°C and 1 atm) 5.46 - The H° value 5.47 - Moles. (You can’t have 1/2 an atom) 5.48 - answer in back of book 4Al(s) + Fe 2 O 3 (s) 2Al 2 O 3 (s) + 4Fe(s) H° = -1708 kJ

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Answers pg. 175, Q 5.45-5.50 5.49 - If 2 = 6542 kJ then 1.5 = 4907 kJ (6542/2 x 1.5) Actually, it should be -4907 kJ since it is exothermic 5.50 -
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Unformatted text preview: 10CaO(s) + 10H 2 O(l) → 10Ca(OH) 2 (s) ∆ H° = -653 kJ Equation is reversed, thus ∆ H° sign changes Equation is multiplied by 10, thus so is ∆ H° Standard heats of reaction 5.45 ° indicates 1 atm (and is usually associated with a temperature of 25 ° C) 5.46 An energy term is added (e.g. ∆ H or ∆ H ° ) 5.47 Moles 5.48 For more lessons, visit www.chalkbored.com...
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## This note was uploaded on 04/12/2011 for the course CHEM 1010 taught by Professor Marshall during the Spring '11 term at North Texas.

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thermochemical-equations-answers - 10CaO(s 10H 2 O(l →...

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