What is the standard enthalpy change for the combustion of liquid cyclopentane,C5H10? 2C5H10(l)+ 15O2(g)→ 10CO2(g)+ 10H2O(l) Substance ΔH°f (kJ/mol) C5H10(l) -105.6 CO2(g) -393.5 H2O(l) -285.8

A) +573.7 kJ B) -573.7 kJ C) +784.9 kJ D) -784.9 kJ E) -6581.8 kJ A) +573.7 kJ B) -573.7 kJ C) +784.9 kJ D) -784.9 kJ E) -6581.8 kJ E

The overall chemical equation resulting from the sum of the following three steps is 2C(s)+ 2H2O(g)→ 2CO(g)+ 2H2(g) CO(g)+ H2O(g)→ CO2(g)+ H2(g) CO(g)+ 3H2(g)→ CH4(g)+ H2O(g)

A) 2C(s)+ 2H2O(g)→ CO2(g)+ CH4(g) B) 2C(s)+ 3H2O(g)→ CO(g)+ CO2(g)+ 3H2(g) C) 2C(s)+ H2O(g)+ H2(g)→ CO(g)+ CH4(g) D) 2CO(g)+ 2H2(g)→ CH4(g)+ CO2(g) E) 2C(s)+ CH4(g)+ 3H2O(g)→ 3CO(g)+ 5H2(g) A) 2C(s)+ 2H2O(g)→ CO2(g)+ CH4(g) B) 2C(s)+ 3H2O(g)→ CO(g)+ CO2(g)+ 3H2(g) C) 2C(s)+ H2O(g)+ H2(g)→ CO(g)+ CH4(g) D) 2CO(g)+ 2H2(g)→ CH4(g)+ CO2(g) E) 2C(s)+ CH4(g)+ 3H2O(g)→ 3CO(g)+ 5H2(g) A

The reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s)+ 2HCl(aq)→ FeCl2(aq)+ H2(g); ΔH° = -87.9 kJ If,in a particular experiment,1.56 kJ of heat was released at constant pressure,what volume of H2(g),measured at STP,was produced? (R = 0.0821 L • atm/(K • mol))

A) 1.38 × 103 L B) 0.434 L C) 22.4 L D) 1.26 × 103 L E) 0.397 L A) 1.38 × 103 L B) 0.434 L C) 22.4 L D) 1.26 × 103 L E) 0.397 L

From the following information,determine ΔH°f of malonic acid,CH2(COOH)2(s). CH2(COOH)2(s)+ 2O2(g)→ 3CO2(g)+ 2H2O(l); ΔH° = -861.0 kJ Substance ΔH°f (kJ/mol) CO2(g) -393.5 H2O(l) -285.8

A) 2613 kJ B) 891.1 kJ C) −1540.3 kJ D) −2613.1 kJ E) −891.1 kJ A) 2613 kJ B) 891.1 kJ C) −1540.3 kJ D) −2613.1 kJ E) −891.1 kJ

The reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s)+ 2HCl(aq)→ FeCl2(aq)+ H2(g); ΔH° = -87.9 kJ In which of the following experiments would the temperature rise the most?

A) 2.2 g of Fe added to 1.0 L of 0.03 M HCl B) 1.1 g of Fe added to 1.0 L of 0.02 M HCl C) 4.5 g of Fe added to 1.0 L of 0.03 M HCl D) 1.1 g of Fe added to 1.0 L of 0.04 M HCl E) 0.56 g of Fe added to 1.0 L of 0.02 M HCl A) 2.2 g of Fe added to 1.0 L of 0.03 M HCl B) 1.1 g of Fe added to 1.0 L of 0.02 M HCl C) 4.5 g of Fe added to 1.0 L of 0.03 M HCl D) 1.1 g of Fe added to 1.0 L of 0.04 M HCl E) 0.56 g of Fe added to 1.0 L of 0.02 M HCl

Exam 6: Thermochemistry

What is the standard enthalpy change for the combustion of liquid cyclopentane,C₅H₁₀? 2C₅H₁₀(l)+ 15O₂(g)→ 10CO₂(g)+ 10H₂O(l) Substance ΔH°_f (kJ/mol) C₅H₁₀(l) -105.6 CO₂(g) -393.5 H₂O(l) -285.8

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(Multiple Choice)

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Question 1

Correct Answer:

Verified

The overall chemical equation resulting from the sum of the following three steps is 2C(s)+ 2H₂O(g)→ 2CO(g)+ 2H₂(g) CO(g)+ H₂O(g)→ CO₂(g)+ H₂(g) CO(g)+ 3H₂(g)→ CH₄(g)+ H₂O(g)

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(Multiple Choice)

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Question 2

Correct Answer:

Verified

Which substance has a standard enthalpy of formation equal to zero at 25°C?

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(Multiple Choice)

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Question 3

Correct Answer:

Verified

The reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s)+ 2HCl(aq)→ FeCl₂(aq)+ H₂(g); ΔH° = -87.9 kJ If,in a particular experiment,1.56 kJ of heat was released at constant pressure,what volume of H₂(g),measured at STP,was produced? (R = 0.0821 L • atm/(K • mol))

(Multiple Choice)

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Question 4

Calculate ΔU of a gas for a process in which the gas absorbs 29 J of heat and does 31 J of work by expanding.

(Multiple Choice)

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Question 5

If q = -96 kJ for a certain process,that process

(Multiple Choice)

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Question 6

If q = 60 kJ and w = 96 kJ for a certain process,that process

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Question 7

Which of the following processes will result in the lowest final temperature of the metal-water mixture at equilibrium?

(Multiple Choice)

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Question 8

Combustion of 3.65 g of liquid benzene (C₆H₆)causes a temperature rise of 21.1°C in a constant-pressure calorimeter that has a heat capacity of 7.23 kJ/°C.What is ΔH for the following reaction? C₆H₆(l)+ O₂(g)→ 6CO₂(g)+ 3H₂O(l)

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Question 9

In a bomb calorimeter,reactions are carried out

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Question 10

When 50.0 mL of 1.27 M of HCl(aq)is combined with 50.0 mL of 1.32 M of NaOH(aq)in a coffee-cup calorimeter,the temperature of the solution increases by 8°C.What is the change in enthalpy for this balanced reaction? HCl(aq)+ NaOH(aq)→ NaCl(aq)+ H₂O(l) Assume that the solution density is 1.00 g/mL and the specific heat capacity of the solution is 4.18 J/g⋅°C.

(Multiple Choice)

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Question 11

From the following information,determine ΔH°_f of malonic acid,CH₂(COOH)₂(s). CH₂(COOH)₂(s)+ 2O₂(g)→ 3CO₂(g)+ 2H₂O(l); ΔH° = -861.0 kJ Substance ΔH°_f (kJ/mol) CO₂(g) -393.5 H₂O(l) -285.8

(Multiple Choice)

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Question 12

When 0.0500 mol of HCl(aq)is reacted with 0.0500 mol of NaOH(aq)in 50.0 mL of water,the temperature of the solution increases by 5.99°C.What is the enthalpy of reaction for the following thermochemical equation? HCl(aq)+ NaOH(aq)→ NaCl(aq)+ H₂O(l) Assume that the heat capacity of the solution and calorimeter is 465.4 J/°C.

(Multiple Choice)

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Question 13

The units for heat capacity are

(Multiple Choice)

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Question 14

The skydiver plunging to earth possesses what type(s)of energy?

(Multiple Choice)

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Question 15

A 58.7-g sample of nickel (s = 0.443 J/(g ∙ °C)),initially at 147.4°C,is placed in an insulated vessel containing 184.0 g of water (s = 4.18 J/(g ∙ °C)),initially at 29.9°C.Once equilibrium is reached,what is the final temperature of the metal-water mixture? Neglect the heat capacity of the vessel.

(Multiple Choice)

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Question 16

How much heat must be applied to a 40.2-g sample of gold (s = 0.129 J/(g ∙ °C))in order to raise its temperature from 28.2°C to 351.5°C?

(Multiple Choice)

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Question 17

Under conditions of constant pressure,for which of the following reactions is the magnitude of pressure-volume work going to be greatest?

(Multiple Choice)

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Question 18

Which of the following reactions corresponds to the thermochemical equation for the standard enthalpy of formation of N,N-diethyl-m-toluamide,C₁₂H₁₇NO(l),the active ingredient in some insect repellents?

(Multiple Choice)

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Question 19

The reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s)+ 2HCl(aq)→ FeCl₂(aq)+ H₂(g); ΔH° = -87.9 kJ In which of the following experiments would the temperature rise the most?

(Multiple Choice)

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Question 20

Showing 1 - 20 of 119

What is the standard enthalpy change for the combustion of liquid cyclopentane,C₅H₁₀? 2C₅H₁₀(l)+ 15O₂(g)→ 10CO₂(g)+ 10H₂O(l) Substance ΔH°_f (kJ/mol) C₅H₁₀(l) -105.6 CO₂(g) -393.5 H₂O(l) -285.8

The overall chemical equation resulting from the sum of the following three steps is 2C(s)+ 2H₂O(g)→ 2CO(g)+ 2H₂(g) CO(g)+ H₂O(g)→ CO₂(g)+ H₂(g) CO(g)+ 3H₂(g)→ CH₄(g)+ H₂O(g)

Which substance has a standard enthalpy of formation equal to zero at 25°C?

Calculate ΔU of a gas for a process in which the gas absorbs 29 J of heat and does 31 J of work by expanding.

If q = -96 kJ for a certain process,that process

If q = 60 kJ and w = 96 kJ for a certain process,that process

Which of the following processes will result in the lowest final temperature of the metal-water mixture at equilibrium?

Combustion of 3.65 g of liquid benzene (C₆H₆)causes a temperature rise of 21.1°C in a constant-pressure calorimeter that has a heat capacity of 7.23 kJ/°C.What is ΔH for the following reaction? C₆H₆(l)+ O₂(g)→ 6CO₂(g)+ 3H₂O(l)

In a bomb calorimeter,reactions are carried out

From the following information,determine ΔH°_f of malonic acid,CH₂(COOH)₂(s). CH₂(COOH)₂(s)+ 2O₂(g)→ 3CO₂(g)+ 2H₂O(l); ΔH° = -861.0 kJ Substance ΔH°_f (kJ/mol) CO₂(g) -393.5 H₂O(l) -285.8

The units for heat capacity are

The skydiver plunging to earth possesses what type(s)of energy?

How much heat must be applied to a 40.2-g sample of gold (s = 0.129 J/(g ∙ °C))in order to raise its temperature from 28.2°C to 351.5°C?

Under conditions of constant pressure,for which of the following reactions is the magnitude of pressure-volume work going to be greatest?

Which of the following reactions corresponds to the thermochemical equation for the standard enthalpy of formation of N,N-diethyl-m-toluamide,C₁₂H₁₇NO(l),the active ingredient in some insect repellents?

The reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s)+ 2HCl(aq)→ FeCl₂(aq)+ H₂(g); ΔH° = -87.9 kJ In which of the following experiments would the temperature rise the most?

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Exam 6: Thermochemistry

What is the standard enthalpy change for the combustion of liquid cyclopentane,C5H10? 2C5H10(l)+ 15O2(g)→ 10CO2(g)+ 10H2O(l) Substance ΔH°f (kJ/mol) C5H10(l) -105.6 CO2(g) -393.5 H2O(l) -285.8

The overall chemical equation resulting from the sum of the following three steps is 2C(s)+ 2H2O(g)→ 2CO(g)+ 2H2(g) CO(g)+ H2O(g)→ CO2(g)+ H2(g) CO(g)+ 3H2(g)→ CH4(g)+ H2O(g)

Which substance has a standard enthalpy of formation equal to zero at 25°C?

Calculate ΔU of a gas for a process in which the gas absorbs 29 J of heat and does 31 J of work by expanding.

If q = -96 kJ for a certain process,that process

If q = 60 kJ and w = 96 kJ for a certain process,that process

Which of the following processes will result in the lowest final temperature of the metal-water mixture at equilibrium?

Combustion of 3.65 g of liquid benzene (C6H6)causes a temperature rise of 21.1°C in a constant-pressure calorimeter that has a heat capacity of 7.23 kJ/°C.What is ΔH for the following reaction? C6H6(l)+ O2(g)→ 6CO2(g)+ 3H2O(l)

In a bomb calorimeter,reactions are carried out

From the following information,determine ΔH°f of malonic acid,CH2(COOH)2(s). CH2(COOH)2(s)+ 2O2(g)→ 3CO2(g)+ 2H2O(l); ΔH° = -861.0 kJ Substance ΔH°f (kJ/mol) CO2(g) -393.5 H2O(l) -285.8

The units for heat capacity are

The skydiver plunging to earth possesses what type(s)of energy?

How much heat must be applied to a 40.2-g sample of gold (s = 0.129 J/(g ∙ °C))in order to raise its temperature from 28.2°C to 351.5°C?

Under conditions of constant pressure,for which of the following reactions is the magnitude of pressure-volume work going to be greatest?

Which of the following reactions corresponds to the thermochemical equation for the standard enthalpy of formation of N,N-diethyl-m-toluamide,C12H17NO(l),the active ingredient in some insect repellents?

The reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s)+ 2HCl(aq)→ FeCl2(aq)+ H2(g); ΔH° = -87.9 kJ In which of the following experiments would the temperature rise the most?

Chemistry and Measurement

Atoms, molecules, and Ions

Calculations With Chemical Formulas and Equations

Chemical Reactions

The Gaseous State

Quantum Theory of the Atom

Electron Configurations and Periodicity

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

States of Matter; Liquids and Solids

Solutions

Rates of Reaction

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Thermodynamics and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry of the Main-Group Metals

The Transition Elements and Coordination Compounds

Organic Chemistry

Polymer Materials: Synthetic and Biological

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What is the standard enthalpy change for the combustion of liquid cyclopentane,C₅H₁₀? 2C₅H₁₀(l)+ 15O₂(g)→ 10CO₂(g)+ 10H₂O(l) Substance ΔH°_f (kJ/mol) C₅H₁₀(l) -105.6 CO₂(g) -393.5 H₂O(l) -285.8

The overall chemical equation resulting from the sum of the following three steps is 2C(s)+ 2H₂O(g)→ 2CO(g)+ 2H₂(g) CO(g)+ H₂O(g)→ CO₂(g)+ H₂(g) CO(g)+ 3H₂(g)→ CH₄(g)+ H₂O(g)

Combustion of 3.65 g of liquid benzene (C₆H₆)causes a temperature rise of 21.1°C in a constant-pressure calorimeter that has a heat capacity of 7.23 kJ/°C.What is ΔH for the following reaction? C₆H₆(l)+ O₂(g)→ 6CO₂(g)+ 3H₂O(l)

From the following information,determine ΔH°_f of malonic acid,CH₂(COOH)₂(s). CH₂(COOH)₂(s)+ 2O₂(g)→ 3CO₂(g)+ 2H₂O(l); ΔH° = -861.0 kJ Substance ΔH°_f (kJ/mol) CO₂(g) -393.5 H₂O(l) -285.8

Which of the following reactions corresponds to the thermochemical equation for the standard enthalpy of formation of N,N-diethyl-m-toluamide,C₁₂H₁₇NO(l),the active ingredient in some insect repellents?

The reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s)+ 2HCl(aq)→ FeCl₂(aq)+ H₂(g); ΔH° = -87.9 kJ In which of the following experiments would the temperature rise the most?