Thermodynamics, Statistical Thermodynamics, & Kinetics
3rd Edition
ISBN: 9780321766182
Author: Thomas Engel, Philip Reid
Publisher: Prentice Hall
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Chapter 4, Problem 4.6CP
Why are heat capacities of reactants and products required for calculations of
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Chapter 4 Solutions
Thermodynamics, Statistical Thermodynamics, & Kinetics
Ch. 4 - In calculating HR at 285.15 K, only the Hf of the...Ch. 4 - What is the point of having an outer water bath in...Ch. 4 - Is the following statement correct? If not rewrite...Ch. 4 - Does the enthalpy of formation of H2Ol change if...Ch. 4 - Why are elements included in the sum in Equation...Ch. 4 - Why are heat capacities of reactants and products...Ch. 4 - Prob. 4.7CPCh. 4 - Prob. 4.8CPCh. 4 - Prob. 4.9CPCh. 4 - Prob. 4.10CP
Ch. 4 - Prob. 4.11CPCh. 4 - Prob. 4.12CPCh. 4 - You wish to measure the heat of solution of NaCl...Ch. 4 - Prob. 4.14CPCh. 4 - Prob. 4.15CPCh. 4 - Prob. 4.16CPCh. 4 - Prob. 4.17CPCh. 4 - Dogs cool off in hot weather by panting. Write a...Ch. 4 - Prob. 4.19CPCh. 4 - Prob. 4.20CPCh. 4 - Given the data in Table 4.1 (Appendix, Data...Ch. 4 - Prob. 4.2NPCh. 4 - A sample of K(s) of mass 2.740 g undergoes...Ch. 4 - Calculate Hf for NO(g) at 975 K, assuming that the...Ch. 4 - Prob. 4.5NPCh. 4 - Derive a formula for HRT for the reaction...Ch. 4 - Prob. 4.7NPCh. 4 - Prob. 4.8NPCh. 4 - Calculate the standard enthalpy of formation of...Ch. 4 - The following data are a DSC scan of a solution of...Ch. 4 - Prob. 4.11NPCh. 4 - Prob. 4.12NPCh. 4 - Prob. 4.13NPCh. 4 - Prob. 4.14NPCh. 4 - Prob. 4.15NPCh. 4 - The total surface area of Asia consisting of...Ch. 4 - Prob. 4.17NPCh. 4 - A sample of Na2SO4s is dissolved in 225 g of water...Ch. 4 - Nitrogen is a vital component of proteins and...Ch. 4 - Prob. 4.20NPCh. 4 - Prob. 4.21NPCh. 4 - A 0.1429 g sample of sucrose C12H22O11 is burned...Ch. 4 - Prob. 4.23NPCh. 4 - Prob. 4.24NPCh. 4 - Prob. 4.25NPCh. 4 - Given the following heat capacity data at 298 K,...Ch. 4 - Calculate H for the process in which Cl2g...Ch. 4 - From the following data at 298.15 K C, calculate...Ch. 4 - Prob. 4.29NPCh. 4 - Use the average bond energies in Table 4.3 I to...Ch. 4 - Prob. 4.31NPCh. 4 - Prob. 4.32NPCh. 4 - Prob. 4.33NPCh. 4 - Prob. 4.34NPCh. 4 - Prob. 4.35NP
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- The formation of aluminum oxide from its elements is highly exothermic. If 2.70 g Al metal is burned in pure O2 to give A12O3, calculate how much thermal energy is evolved in the process (at constant pressure).arrow_forwardThe decomposition of ozone, O3, to oxygen, O2, is an exothermic reaction. What is the sign of q? If you were to touch a flask in which ozone is decomposing to oxygen, would you expect the flask to feel warm or cool?arrow_forwardYou did an experiment in which you found that 59.8 J was required to raise the temperature of 25.0 g of ethylene glycol (a compound used as antifreeze in automobile engines) by 1.00 K. Calculate the specific heat capacity of ethylene glycol from these data.arrow_forward
- A sample of benzene, C6H6, weighing 3.51 g was burned in an excess of oxygen in a bomb calorimeter. The temperature of the calorimeter rose from 25.00C to 37.18C. If the heat capacity of the calorimeter and contents was 12.05 kJ/C, what is the value of q for burning 1.00 mol of benzene at constant volume and 25.00C? The reaction is C6H6(l)+152O2(g)6CO2(g)+3H2O(l) Is q equal to U or H?arrow_forwardWhen 1.000 g of ethylene glycol, C2H6O2, is burned at 25C and 1.00 atmosphere pressure, H2O(l) and CO2(g) are formed with the evolution of 19.18 kJ of heat. a Calculate the molar enthalpy of formation of ethylene glycol. (It will be necessary to use data from Appendix C.) b Gf of ethylene glycol is 322.5 kJ/mol. What is G for the combustion of 1 mol ethylene glycol? c What is S for the combustion of 1 mol ethylene glycol?arrow_forward2. In which of the following reactions is there a significant transfer of energy as work from the system to the surroundings? This occurs if there is a change in the number of moles of gases. C(s) + O2(g) → CO2(g) CH4(g) + 2 O2(g) → CO2g) + 2 H2O(g) 2 C(s) + O2(g) → 2 CO(g) 2 Mg(s) + O2(g) → 2 MgO(s)arrow_forward
- When 1.000 g of gaseous butane, C4H10, is burned at 25C and 1.00 atm pressure, H2O(l) and CO2(g) are formed with the evolution of 49.50 kJ of heat. a Calculate the molar enthalpy of formation of butane. (Use enthalpy of formation data for H2O and CO2.) b Gf of butane is 17.2 kJ/mol. What is G for the combustion of 1 mol butane? c From a and b, calculate S for the combustion of 1 mol butane.arrow_forwardWould the amount of heat absorbed by the dissolution in Example 5.6 appear greater, lesser, or remain the same if the heat capacity of the calorimeter were taken into account? Explain your answer.arrow_forwardThe statement Energycan beneithercreatednor destroyedis sometimes used as an equivalent statement of the first law of thermodynamics. There areinaccuracies to the statement, however. Restate it tomake it less inaccurate.arrow_forward
- Which of the following processes will lead to a decrease in the internal energy of a system? (1) Energy is transferred as heat to the system; (2) energy is transferred as heat from the system; (3) energy is transferred as work done on the system; or (4) energy is transferred as work done by the system. (a) 1 and 3 (b) 2 and 4 (c) 1 and 4 (d) 2and3arrow_forwardA sample of ethanol, C2H5OH, weighing 2.84 g was burned in an excess of oxygen in a bomb calorimeter. The temperature of the calorimeter rose from 25.00C to 33.73C. If the heat capacity of the calorimeter and contents was 9.63 kJ/C, what is the value of q for burning 1.00 mol of ethanol at constant volume and 25.00C? The reaction is C2H5OH(l)+3O2(g)2CO2(g)+3H2O(l) Is q equal to U or H?arrow_forward9.42 Why is enthalpy generally more useful than internal energy in the thermodynamics of real world systems?arrow_forward
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