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129 solutions

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