A sample of pure solid naphthalene (C1,Hg) weighing 0.6410 g is burned completely with oxygen to CO2(g) and H,O(€) in a constant-volume calorimeter at 25°C. The amount of heat evolved is observed to be 25.79 kJ. (a) Write and balance the chemical equation for the com- bustion reaction. (b) Calculate the standard change in internal energy (AU°) for the combustion of 1.000 mol naphthalene to CO2(g) and H,O(€). (c) Calculate the standard enthalpy change (AH°) for the same reaction as in part (b). (d) Calculate the standard enthalpy of formation per mole of naphthalene, using data for the standard enthalpies of formation of CO2(g) and H,O(€) from Appendix D.

A sample of pure solid naphthalene (C1,Hg) weighing 0.6410 g is burned completely with oxygen to CO2(g) and H,O(€) in a constant-volume calorimeter at 25°C. The amount of heat evolved is observed to be 25.79 kJ. (a) Write and balance the chemical equation for the com- bustion reaction. (b) Calculate the standard change in internal energy (AU°) for the combustion of 1.000 mol naphthalene to CO2(g) and H,O(€). (c) Calculate the standard enthalpy change (AH°) for the same reaction as in part (b). (d) Calculate the standard enthalpy of formation per mole of naphthalene, using data for the standard enthalpies of formation of CO2(g) and H,O(€) from Appendix D.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: Indicate the sign of the enthalpy change, ΔH, in the following processes carried out under…

A: When a reaction takes place, various bonds are formed and broken. Due to this, the energy of…

Q: 2) Use the standard reaction enthalpies given below to determine AH' rxn for the following reaction…

Q: Use the Thermodynamic Properties at 25 degrees Celsius Table to find standard enthalpies of reaction…

A: Well, we will require the standard enthalpy of formation to calculate the standard enthalpies of the…

Q: The combustion of 1.524g of sucrose, C12H22O11(s), a bomb calorimeter with a heat capacity of…

A: Heat capacity of calorimeter = 4.50 kJ/oCinitial temperature = 22.22 oCfinal temperature = 27.81…

Q: A 2.50 g sample of powdered zinc is added to 100.0 mL of a 2.00 M aqueous solution of hydrobromic…

Q: In the following experiment, a coffee-cup calorimeter containing 100.0 mL of H2O is used. The…

A: The mass of CaCl2 added to water is = 9.20 g The enthalpy of dissolution of CaCl2 is = -82.8 kJ/mol…

Q: iquid ethanol, (C2H5OH), combusts in the presence of oxygen, O2. The products of the reaction are…

A: The combustion is the burning of a substance in the presence of oxygen. The common products of the…

Q: 7) Use the standard reaction enthalpies given below to determine AH°rxn for the following reaction:…

Q: Which statements below correctly explain how the entropy of surroundings of a reaction is related to…

A: As we know, in an exothermic reaction heat is released during reaction and absorbed by the…

Q: A 0.8563 g sample of C14H30 (molar mass = 198.394 g/mol) undergoes combustion in a bomb calorimeter…

A: The given data contains, mass of sample = 0.8563 gSpecific heat capacity =63.92 kJ/°CTemperature…

Q: Give detailed Solution... Don't give Handwritten answer..don't use Ai for answering this

A: The mass of methanol that must be burn = 24.9 gExplanation:Step 1: Calculation of moles of methanol…

Q: When exactly one mole of chrysene, C₁8H12(s) is burned at 25°C in a bomb calorimeter, AE = -8942.6…

Q: The compound heptane, C7H16, is a good fuel. It is a liquid at ordinary temperatures. When the…

Q: 4.0

A: We will. Calculate ∆H

Q: Oxyacetylene torches produce such high temperature that they are often used to weld and cut metal.…

Q: 5b. The Standard Molar Enthalpy of Formation (AH° f ) of hydrogen cyanide, (HCN(g)), cannot be…

Q: The combustion of 1.839 g glucose, C6H12O6(s), in a bomb calorimeter results in an increase in the…

A: The quantity of heat absorbed by the calorimeter is calculated below. Negative sign indicates that…

Q: CO (g) + 2 O₂ (g) → CO₂ (g) a) For this gas phase reaction, determine (i) ArxnH (in kJ/mole) and…

A: (A)The value of delta H for the given reaction can be calculated as ∆Hf = ∑Hproducts - ∑H reactants=…

Q: 15.00 g of Compound X'with molecular formula C,H, are burned in a constant-pressure calorimeter…

A: Given: Mass of compound , X(C4H8) = 15.00 g Molar mass of X(C4H8) = 56.107 g/mol Moles of compound…

Q: Suppose 0.100 mol of a metal (M) is combusted in excess O2(g) in a bomb calorimeter. 4M(s) + 302…

A: Given: 4M + 3O2 -----> 2M2O

Q: The heat required to sustain animals that hibernate comes from the biochemical oxidation of fatty…

A: Data-: ΔH0f(Arachidonic acid) = -636 Kj/mol C (s) + O2(g) ---> CO2(g ) , ΔH0= -393 .5Kj/mol…

Q: Calculate ΔHrxn

Q: When 17.2 g of cesium sulfate (Cs2SO4) is dissolved in 120 g of water in a styrofoam calorimeter of…

Q: When 50.0 mL of 1.24 M of HCI(aq) is combined with 50.0 mL of 1.32 M of NaOH(aq) in a coffee-cup…

Q: At constant volume, the heat of combustion of a particular compound is -3649.0 kJ/mol. When 1.855 g…

A: To solve this problem we have to calculate the calorimeter constant .

Question

A sample of pure solid naphthalene (C1,Hg) weighing
0.6410 g is burned completely with oxygen to CO2(g) and
H,O(€) in a constant-volume calorimeter at 25°C. The
amount of heat evolved is observed to be 25.79 kJ.
(a) Write and balance the chemical equation for the com-
bustion reaction.
(b) Calculate the standard change in internal energy
(AU°) for the combustion of 1.000 mol naphthalene
to CO2(g) and H,O(€).
(c) Calculate the standard enthalpy change (AH°) for the
same reaction as in part (b).
(d) Calculate the standard enthalpy of formation per
mole of naphthalene, using data for the standard
enthalpies of formation of CO2(g) and H,O(€) from
Appendix D.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Answer

Trending now

This is a popular solution!

Step by step

Solved in 6 steps

SEE SOLUTION Check out a sample Q&A here

Similar questions

A 2.50 g sample of powdered zinc is added to 100.0 mL of a 2.00 M aqueous solution of hydrobromic acid in a calorimeter. The total heat capacity of the calorimeter and solution is 448 J/K. The observed increase in temperature is 21.1 K at a constant pressure of one bar. Calculate the standard enthalpy of reaction using these data. Zn(s) + 2 HBr(aq) →→→→ ZnBr₂(aq) + H₂(g) AHin = kJ/mol
7. (a A 5.00 mol sample of an ideal gas is compressed irreversibly and isothermally at 150.00 K from an initial volume of 30.00 L in two steps: Step #1: Pext = 5.00 bar, Step #2: Pext = 20.00 bar. Determine the value of the total work and heat involved (in J). (b) Describe in words what happens to the total amount of work if the compression occurs in three steps. (c). Assuming the process could be done in one or multiple steps and the process could be reversible or irreversible, determine the minimum and maximum amount of work that could be done to complete the compression.
2.000 g of Compound X with molecular formula C5H₁0 are burned in a constant-pressure calorimeter containing 45.00 kg of water at 25 °C. The temperature 10 of the water is observed to rise by 0.4696 °C. (You may assume all the heat released by the reaction is absorbed by the water, and none by the calorimeter itself.) Calculate the standard heat of formation of Compound X at 25 °C. Be sure your answer has a unit symbol, if necessary, and round it to 3 significant digits. 0 00 X Ś x10
Part B 2.0000 g of the unknown compound is burned in a bomb calorimeter. During the combustion, the temperature of the calorimeter increases from 23.125°C to 28.997 °C. During calibration, the heat capacity of the calorimeter was found to be 9.9897kJ °C-1. In the previous experiment, the molar mass of the substance was found to be 148.16 gmol-1. What is AcombU for the unknown compound? να ΑΣφ ? kJ mol1 Submit Request Answer
A 0.576 g sample of liquid C5H12 was combusted using excess oxygen gas inside a bomb calorimeter, with the products being carbon dioxide gas and liquid water. The calorimeter's heat capacity is 4.957 kJ °C^-1. If the temperature inside the calorimeter increased from 25.0 °C to 35.1 °C, determine A,U for this reaction in kl mol (with respect to C3H12). Do not worry about how realistic the final answer is.
12.00 g of Compound with molecular formula C4h8 are burned in a constant-pressure calorimeter containing 15.00 kg of water at 25 °C. The temperature of the water is observed to rise by 8.603 °C. (You may assume all the heat released by the reaction is absorbed by the water, and none by the Calculate the standard heat of formation of Compound X at 25 °C. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits. calorimeter itself.)
10. The following molar enthalpies of formation are given in kJ/mol: AHP[C;Hs(g)] = -104; AHP[CO2(g)] = -394; AHP[H;O(g)] = -242. (a) Calculate the molar heat of combustion of propane (C;Hs) according to the following equation: C;Hs(g) + 5 O2(g) → 3CO2(g) + 4H2O(g); (b) How many grams of propane gas must be combusted to provide enough thermal energy to heat 1.00 kg water from 22.0°C to 100.0°C? (Specific heat of water = 4.184 J/mol.K)
CH,,0, (s) + 60, (g) → 6CO, (g) + 6H,0(g) 12 The combustion of glucose was performed in a bomb calorimeter. Qwater= 14.52kJ. The heat capacity of the bomb is Ca = 2.273 kJ/C and the change in temperature was 28.49C. If 0.03255 moles of glucose was used in the bomb calorimeter, then what is AHmy in kJ/mol? a. ´cal rnx
A chemist measures the enthalpy change AH during the following reaction: COCL,(9) + 4 NH,(g)–+cO(NH,),(s) + 2 NH,Cl(s) AH=-559. kJ Use this information to complete the table below. Round each of your answers to the neare reaction AH co(NH,),(-) + NH,CI(3) - coC, () + 2NH, (2) 3coCI, (3) + 12NH, (3) - 3c0(NH,), (-) + 6NH,CI(s) co(NH,),() + 2NH,C1(«) → COCI, (3) + 4NH, (2) Explanation Check MacBook Air 20 F1 F3 F4 F5 F6 F @ & くC
(b) What is the specific enthalpy of combustion of ethane? kJ/g. 3 sig. number.