15.2 Stoichiometry with Heat

15.2 Stoichiometry with Heat - 3.0g of HCl? NaOH + HCl H 2...

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Dr. Paul Moses 15.2 Stoichiometry with Heat Concept Worksheet Once the enthalpy of reaction is known, it can be used like any other component of the reaction in stoichiometry calculations. The enthalpy relates the amount of heat released or gained to the moles of reacting component, allowing one to convert from weight of reagent to J of energy. Practice Problems: 1. The enthalpy of the reaction below is -750 KJ/mole. What amount of heat will be released when 15g of C 3 H 8 is burned with excess oxygen? C 3 H 8 + 5 O 2 3 CO 2 + 4 H 2 O 2. Given the reaction below, what heat is released when 2.0g of NaOH reacts with
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Unformatted text preview: 3.0g of HCl? NaOH + HCl H 2 O + NaCl + 150 KJ 3. I rust 6.2g of iron as shown below with an excess of O 2 . How many J of heat are released? 4 Fe + 3 O 2 2 Fe 2 O 3 + 112KJ 4. I burn a mixture of CH 4 and an inert gas with excess O 2 , see reaction below, in a calorimeter. If the reaction releases 2,500 J, what was the weight of CH 4 in the original mixture? CH 4 + 2 O 2 CO 2 + 2 H 2 O + 440KJ Answers: 1. 256 KJ 2. 7.5 KJ ( NaOH limiting) 3. 3.1 KJ 4. 0.091 g...
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This note was uploaded on 03/26/2008 for the course CHEM 102 taught by Professor Williamson during the Spring '08 term at Texas A&M.

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