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CHEM 1100-Laboratory Cal State LA Handout 1. How much energy is required to raise the temperature of 35.0 g of water from 30.0°C to 95°C (4.184 J/(g °C)? How much is needed for Fe (0.385 J/(g °C)? 2. The standard enthalpy of combustion of benzoic acid (molar mass 122 g/mol) is -3225 kJ/mol. Calculate the heat capacity of a bomb calorimeter if a temperature increase of 2.16°C occurs on combusting 0.500 g benzoic acid in the presence of excess O2. 3. The same quantity of energy is added to 20.0g of mercury, alcohol, and octane, all initially at 25°C. The molar heat capacities of these three compounds are 28.3 J/(mol K), 111 J/ (mol K), and 289.5 J/(mol K), respectively. Order the compounds from highest to lowest final temperatures? 4. Use the reaction enthalpies given below to determine AH°rxn for the following reaction. 2 H2S(g)3 O2(g)2 SO2(g) + 2H2O(g) AHorxn = ? Given: H2lg)+O2(g)H2O(g) AH° -241.8.01 kJ SO2(g) 3H2(g)H2S(g)2H20(g) AH 34.8 kJ 1 Science ody and am's

CHEM 1100-Laboratory Cal State LA Handout 1. How much energy is required to raise the temperature of 35.0 g of water from 30.0°C to 95°C (4.184 J/(g °C)? How much is needed for Fe (0.385 J/(g °C)? 2. The standard enthalpy of combustion of benzoic acid (molar mass 122 g/mol) is -3225 kJ/mol. Calculate the heat capacity of a bomb calorimeter if a temperature increase of 2.16°C occurs on combusting 0.500 g benzoic acid in the presence of excess O2. 3. The same quantity of energy is added to 20.0g of mercury, alcohol, and octane, all initially at 25°C. The molar heat capacities of these three compounds are 28.3 J/(mol K), 111 J/ (mol K), and 289.5 J/(mol K), respectively. Order the compounds from highest to lowest final temperatures? 4. Use the reaction enthalpies given below to determine AH°rxn for the following reaction. 2 H2S(g)3 O2(g)2 SO2(g) + 2H2O(g) AHorxn = ? Given: H2lg)+O2(g)H2O(g) AH° -241.8.01 kJ SO2(g) 3H2(g)H2S(g)2H20(g) AH 34.8 kJ 1 Science ody and am's

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter8: Thermochemistry
Section: Chapter Questions
Problem 14QAP: In earlier times, ethyl ether was commonly used as an anesthetic. It is, however, highly flammable....
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CHEM 1100-Laboratory Cal State LA Handout 1. How much energy is required to raise the temperature of 35.0 g of water from 30.0°C to 95°C (4.184 J/(g °C)? How much is needed for Fe (0.385 J/(g °C)? 2. The standard enthalpy of combustion of benzoic acid (molar mass 122 g/mol) is -3225 kJ/mol. Calculate the heat capacity of a bomb calorimeter if a temperature increase of 2.16°C occurs on combusting 0.500 g benzoic acid in the presence of excess O2. 3. The same quantity of energy is added to 20.0g of mercury, alcohol, and octane, all initially at 25°C. The molar heat capacities of these three compounds are 28.3 J/(mol K), 111 J/ (mol K), and 289.5 J/(mol K), respectively. Order the compounds from highest to lowest final temperatures? 4. Use the reaction enthalpies given below to determine AH°rxn for the following reaction. 2 H2S(g)3 O2(g)2 SO2(g) + 2H2O(g) AHorxn = ? Given: H2lg)+O2(g)H2O(g) AH° -241.8.01 kJ SO2(g) 3H2(g)H2S(g)2H20(g) AH 34.8 kJ 1 Science ody and am's
Transcribed Image Text:CHEM 1100-Laboratory Cal State LA Handout 1. How much energy is required to raise the temperature of 35.0 g of water from 30.0°C to 95°C (4.184 J/(g °C)? How much is needed for Fe (0.385 J/(g °C)? 2. The standard enthalpy of combustion of benzoic acid (molar mass 122 g/mol) is -3225 kJ/mol. Calculate the heat capacity of a bomb calorimeter if a temperature increase of 2.16°C occurs on combusting 0.500 g benzoic acid in the presence of excess O2. 3. The same quantity of energy is added to 20.0g of mercury, alcohol, and octane, all initially at 25°C. The molar heat capacities of these three compounds are 28.3 J/(mol K), 111 J/ (mol K), and 289.5 J/(mol K), respectively. Order the compounds from highest to lowest final temperatures? 4. Use the reaction enthalpies given below to determine AH°rxn for the following reaction. 2 H2S(g)3 O2(g)2 SO2(g) + 2H2O(g) AHorxn = ? Given: H2lg)+O2(g)H2O(g) AH° -241.8.01 kJ SO2(g) 3H2(g)H2S(g)2H20(g) AH 34.8 kJ 1 Science ody and am's
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