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20. Consider the intermolecular forces and determine which of the following will be the most soluble molecule? a. CH3CH3 b. CH3CH2OH C. CH3CH2CH2OH d. CH3OH 21. An iron piston in a compressor has a mass of 3.62 mg. If the specific heat of iron is 0.449 J/g°C, how much heat is required to raise the temperature of the piston from 12.0°C to 111.0°C? a. 1.61 × 102 J b. 7.08 × 108 J c. 1.61 x 10-1 J d. 4.35 × 105 J 200.0 22. A new alloy is designed for use in a car radiator. If the 1.60 kg radiator required 1.69 × 10² J of heat to warm from 25.1°C to 255.8°C, what is the specific heat of the new alloy? a. 0.369 J/g°C b. 8.27 J/g°C c. 0.00491 J/g°C d. 0.000458 J/g°C 23. Given the following heat of formation values, calculate the heat of reaction for: Mg(s) + Cl2(g) → MgCl2(s). AHf value in kJ/mol for Mg(s) is 0, for Mg(g) is 108.7, for Cl2(g) is 0, and for MgCl2(s) is -811.0. a. -411.0 kJ b. +411.0 kJ c. -302.3 kJ d. -811 kJ

20. Consider the intermolecular forces and determine which of the following will be the most soluble molecule? a. CH3CH3 b. CH3CH2OH C. CH3CH2CH2OH d. CH3OH 21. An iron piston in a compressor has a mass of 3.62 mg. If the specific heat of iron is 0.449 J/g°C, how much heat is required to raise the temperature of the piston from 12.0°C to 111.0°C? a. 1.61 × 102 J b. 7.08 × 108 J c. 1.61 x 10-1 J d. 4.35 × 105 J 200.0 22. A new alloy is designed for use in a car radiator. If the 1.60 kg radiator required 1.69 × 10² J of heat to warm from 25.1°C to 255.8°C, what is the specific heat of the new alloy? a. 0.369 J/g°C b. 8.27 J/g°C c. 0.00491 J/g°C d. 0.000458 J/g°C 23. Given the following heat of formation values, calculate the heat of reaction for: Mg(s) + Cl2(g) → MgCl2(s). AHf value in kJ/mol for Mg(s) is 0, for Mg(g) is 108.7, for Cl2(g) is 0, and for MgCl2(s) is -811.0. a. -411.0 kJ b. +411.0 kJ c. -302.3 kJ d. -811 kJ

World of Chemistry
World of Chemistry
7th Edition
ISBN:9780618562763
Author:Steven S. Zumdahl
Publisher:Steven S. Zumdahl
Chapter10: Energy
Section: Chapter Questions
Problem 65A
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20. Consider the intermolecular forces and determine which of the following will be the most soluble molecule? a. CH3CH3 b. CH3CH2OH C. CH3CH2CH2OH d. CH3OH 21. An iron piston in a compressor has a mass of 3.62 mg. If the specific heat of iron is 0.449 J/g°C, how much heat is required to raise the temperature of the piston from 12.0°C to 111.0°C? a. 1.61 × 102 J b. 7.08 × 108 J c. 1.61 x 10-1 J d. 4.35 × 105 J 200.0 22. A new alloy is designed for use in a car radiator. If the 1.60 kg radiator required 1.69 × 10² J of heat to warm from 25.1°C to 255.8°C, what is the specific heat of the new alloy? a. 0.369 J/g°C b. 8.27 J/g°C c. 0.00491 J/g°C d. 0.000458 J/g°C 23. Given the following heat of formation values, calculate the heat of reaction for: Mg(s) + Cl2(g) → MgCl2(s). AHf value in kJ/mol for Mg(s) is 0, for Mg(g) is 108.7, for Cl2(g) is 0, and for MgCl2(s) is -811.0. a. -411.0 kJ b. +411.0 kJ c. -302.3 kJ d. -811 kJ
Transcribed Image Text:20. Consider the intermolecular forces and determine which of the following will be the most soluble molecule? a. CH3CH3 b. CH3CH2OH C. CH3CH2CH2OH d. CH3OH 21. An iron piston in a compressor has a mass of 3.62 mg. If the specific heat of iron is 0.449 J/g°C, how much heat is required to raise the temperature of the piston from 12.0°C to 111.0°C? a. 1.61 × 102 J b. 7.08 × 108 J c. 1.61 x 10-1 J d. 4.35 × 105 J 200.0 22. A new alloy is designed for use in a car radiator. If the 1.60 kg radiator required 1.69 × 10² J of heat to warm from 25.1°C to 255.8°C, what is the specific heat of the new alloy? a. 0.369 J/g°C b. 8.27 J/g°C c. 0.00491 J/g°C d. 0.000458 J/g°C 23. Given the following heat of formation values, calculate the heat of reaction for: Mg(s) + Cl2(g) → MgCl2(s). AHf value in kJ/mol for Mg(s) is 0, for Mg(g) is 108.7, for Cl2(g) is 0, and for MgCl2(s) is -811.0. a. -411.0 kJ b. +411.0 kJ c. -302.3 kJ d. -811 kJ
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