8. Thermochemistry

Given the thermochemical equation CH_4(g) + 2 O_2(g) → CO_2(g) + 2 H_2O(l); ΔH = -890 kJ, what is the enthalpy change (ΔH) when 530 g of methane (CH_4) is combusted?

What is the standard enthalpy change (ΔH°) for the reaction: CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l)?

Which of the following reactions represents the standard enthalpy of formation (ΔH_f^∘) for water (H_2O(l))?

Which of the following is a correctly written thermochemical equation?

For which one of the following reactions is the value of ΔH_rxn equal to ΔH_f for the product?

The enthalpy of formation (ΔH_f) of carbon dioxide is negative. Which statement is true?

Given the thermochemical equation: H2(g) + Cl2(g) → 2 HCl(g); ΔH = -184 kJ, what is the value of the enthalpy change per mole of HCl(g) produced?

Which of the following reactions is best represented by a diagram showing a decrease in enthalpy (exothermic process)?

Which of the following statements regarding enthalpy is false?

Given the thermochemical equation: CH4(g) + 2 H2(g) → C2H6(g), calculate ΔH° for the reaction if the standard enthalpies of formation are: ΔH°f(CH4(g)) = -74.8 kJ/mol, ΔH°f(H2(g)) = 0 kJ/mol, and ΔH°f(C2H6(g)) = -84.7 kJ/mol.

Which of the following represents the standard heat of formation reaction for sodium chloride (NaCl) in its solid form?

Given the thermochemical equation: 2 O_3(g) → 3 O_2(g)ΔH = -284 kJ, what is the enthalpy change for this reaction per mole of O_3(g)?

Using the appropriate bond energies, calculate the enthalpy change (ΔH) for the reaction: H_2(g) + Cl_2(g) → 2HCl(g). Given the following average bond energies: H–H = 436 kJ/mol, Cl–Cl = 242 kJ/mol, H–Cl = 431 kJ/mol.

For which one of the following reactions is the value of ΔH°_rxn equal to ΔH°_f for the product?

Given the reaction: CH_4(g) + 4 Cl_2(g) → CCl_4(l) + 4 HCl(g), what is the standard enthalpy change (ΔH°) for this reaction? Use the following standard enthalpies of formation: ΔH_f°(CH_4(g)) = -74.8 kJ/mol, ΔH_f°(Cl_2(g)) = 0 kJ/mol, ΔH_f°(CCl_4(l)) = -139.3 kJ/mol, ΔH_f°(HCl(g)) = -92.3 kJ/mol.