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Enthalpy of Formation

#### Q. When 5.00 g of solid barium react with chlorine gas to produce solid barium chloride, 31.1 kJ of heat is released. Calculate the heat when 1 mole of barium chloride is produced. q = 6.22 kJ q = -6.22 kJ q = -31.1 kJ q = -855 kJ q = 855 kJ q = 31.1 kJ

Solved • Nov 14, 2019

Enthalpy of Formation

#### Q. Use the following data to calculate the standard enthalpy of formation of ethane, C2H6 (g). 2 C2H6 (g) + 7 O2(g) → 4 CO2 (g) + 6 H2O(ℓ)     ΔH° = -3119.6 kJ/mol 2 H2 (g) + O2 (g) → 2 H2O(ℓ )     ΔH° = -571.6 kJ/mol ΔHf° of CO2 (g) = -393.5 kJ/mol

Solved • Nov 13, 2019

Enthalpy of Formation

#### Q. Calculate the enthalpy change using the net ionic equation for the given neutralization reaction at 25 C. The values of AH can be found in the Thermodynamic Properties at 298 K table. 2KOH(aq)+H 2 SO 4 (aq) = K 2 SO 4 (aq)+2H 2 O(l) What is Delta H in kJ?

Solved • Nov 13, 2019

Enthalpy of Formation

#### Q. Write the balanced chemical equation for the standard enthalpy of formation of P 4 O 10 (s) (Be sure to include the phrases (liquid, aqueous, etc.).

Solved • Nov 13, 2019

Enthalpy of Formation

#### Q. Consider the following reaction: 2NO2(g) ⇌ 2NO(g) + O2(g) The data in the table show the equilibrium constant for this reaction measured at several different temperatures. Use the data to find ΔH°rxn for the reaction. Express your answer in kilojoules per mole.

Solved • Oct 11, 2019

Enthalpy of Formation

#### Q. The standard enthalpy change for the reaction of SO3(g) with H2O(l) to yield H2SO4(aq) is ΔH° = -227.8 kJ. Use the following information S(s) + O2(g) → SO2(g) ΔH° = -296.8 kJ SO2(g) + 1/2 O2(g) → SO3(g) ΔH° = -98.9 kJ to calculate ΔH°f for H2SO4(aq) (in kilojoules per mole). [For H2O(l). ΔH°f = -285.8 kJ/mol]. Express your answer using four significant figures.

Solved • Nov 10, 2019

Enthalpy of Formation

#### Q. How much energy is released when 8.5 moles of O2 reacts with excess CH4(g)?

Solved • Nov 10, 2019