(a)
Interpretation: The value of
Concept introduction:Thermodynamics is a study of energy transfers that can be done by either heat or work. The energy transferred through work involves force. When work is positive, the system gains energy,whereas, when work is negative, the system loses energy. Heat is not a state function, and therefore, change in enthalpy of reaction
(b)
Interpretation: The value of
Concept introduction:Thermodynamics is a study of energy transfers that can be done by either heat or work. The energy transferred through work involves force. When work is positive,the system gains energy, whereas, when work is negative, the system loses energy. Heat is not a state function and therefore change in enthalpy of reaction
Want to see the full answer?
Check out a sample textbook solutionChapter 3 Solutions
Organic Chemistry: Structure and Function
- Use the information given to calculate total energy change for the reaction of ethane (C2H6) with oxygen gas(O2) producing carbon dioxide and water. C2H6 + 7/202→ 2CO2 + 3H20 AHt C2H6 = +390 kJ/mol AHt O2 = 0 kJ/mol AHf CO2 = -209.75 kJ/mol AHt H2O = +200 kJ/molarrow_forwardConsider this reaction:2CH3OH(l) + 3O2(g) → 4H2O(l) + 2CO2(g) ∆H = –1452.8 kJ/mol Is this reaction endothermic or exothermic? What is the value of ∆H if the equation is multiplied throughout by 2? What is the value of ∆H if the direction of the reaction is reversed so that the products become the reactants and vice versa? What is the value of ∆H if water vapor instead of liquid water is formed as the product?arrow_forwardUsing the equations 2 Fe (s) + 3 Cl₂ (g) → 2 FeCl₃ (s) ∆H° = -800.0 kJ/mol Si(s) + 2 Cl₂ (g) → SiCl₄ (s) ∆H° = -640.1 kJ/mol Determine the enthalpy for the reaction 3 SiCl₄ (s) + 4 Fe (s) → 4 FeCl₃ (s) + 3 Si (s) i got 640.6 kJ/mol, is that correct?arrow_forward
- What is the name of the process shown below and how does it work (be specific about what happens to the molecules involved)? Which class of biomolecules (protein, lipid, carbohydrate, nucleic acid) are involved in this particular reaction example? List at least 2 types of functions this class of macromolecules might be involved in biologically. CH₂OH CH₂OH CH2OH CH₂OH НО ОН он ОН н ОН OH ОН Н + H2O → HO ОН ОН н OH + НО ОН ОН Н ОНarrow_forwardGiven the following two reactions and enthalpy data:CH2CO(g) + 2O2(g) → 2CO2(g) + H2O(g) ∆H = 981.1 kJCH4(g) + 2O2(g) → CO2(g) + 2H2O(g) ∆H = 802.3 kJ Calculate the enthalpy change for the reaction in which methane and oxygen combine to form ketene, CH2CO, and water. 2CH4(g) + 2O2(g) → CH2CO(g) + 3H2O(g) ∆H = ? kJ/molarrow_forwardWhich of the following reactions represents an endothermic reaction? 2 SO3 (3) + 198 kJ → 2 SO2 (3) + O2 (g) 02 C,H6 + 702 2 (g) 4 CO2(2) + 6 H2O (1)+ (g) 3120 kJ O CHA (3) + 2O2 (8) → CO2 () + 2H2O (g) + 890 kJ 2 SO2 (e) 2S + 202 () +376 kJ (s) insert %23 2 "3 4 E R SID G H J K pause alt ト LL LLIarrow_forward
- Consider the reactionsN2H4(l) + CH4O(l) → CH2O(g) + N2(g) + 3H2(g) ΔH = 80 kJ/molN2(g) + 3 H2(g) → 2 NH3(g) ΔH = −91.8 kJ/molCH4O(l) → CH2O(g) + H2(g) ΔH = 130.6 kJ/molWhat is the ΔH for the over all reaction shown below in kJ/mol?arrow_forwardUsing the equations 2 Sr(s) + O₂ (g) → 2 SrO (s) ∆H° = -1184 kJ/mol CO₂ (g) → C (s) + O₂ (g) ∆H° = 394 kJ/mol Determine the enthalpy for the reaction C(s) + 2 SrO(s) → CO₂ (g) + 2 Sr(s).arrow_forwardGiven the following: 2 Fe(s) + 3/2 O2(g) → Fe2O3(s) ΔHorxn = -824.2 kJ/mol 3 Fe(s) + 2 O2(g) → Fe3O4(s) ΔHorxn = -1118.4 kJ/mol Calculate the ΔHorxn for the following equation: 3 Fe2O3(s) → 2 Fe3O4(s) + 1/2 O2(g) Your answer should be to one place past the decimal point.arrow_forward
- 4. Laboratory quantities of ethylene gas, C2HA(g), can be prepared by an elimination reaction of ethanol using an acid catalyst. What mass ethylene would have been produeced if 5.00kg of air in the surroundings changed from 25.00°C to 19.50°C. Assume that energy transfer is only occurring with the air and that the air has an average molar mass of 29.0g/mol. C2H$OH(I) → C,Ha(g) + H20(1) AH° = ?arrow_forwardConsider the hypothetical value below. What is meant by the enthalpy of its reverse reaction? A + 3B → 2C ∆H = 357 kJ The reaction would release the same energy in the forward reaction. The reaction absorbed energy from the surrounding. The reaction released a double in amount since the product have 2 moles of C. The reaction released two-thirds of the ∆H of the forward reaction.arrow_forwardGiven that the reaction of 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 3 H2O (g) ΔΗ - 906 kJ What would AH for NO (g) + 3 H2O (g) → NH3 (g) + O2 (g) be? O 226.5 kJ O 453 kJ -226.5 kJ O 906 kJarrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage Learning
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning