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10 solutions

Enthalpy

Q. Use the ΔH°f and ΔH°rxn information provided to calculate ΔH°f for IF: ΔH°f (kJ/mol) IF7(g) + I2(g) → IF5(g) + 2 IF(g) ΔH°rxn = -89 kJ IF7(g) -941 IF5(g) -840

Solved • Jul 25, 2019

Enthalpy

Q. The reaction for the combustion of ethanol is given below. C2H5OH(l) + 3 O2(g) -> 2 CO2(g) + 3 H2O(g); ΔH = -1234.8 kJ/mol How much heat will be generated and released into the surroundings when 143 g ethanol is burned?

Solved • Jul 18, 2019

Enthalpy

Q. Calculate the standard enthalpy change (ΔH°rxn) for the reaction of TiCl4(g) and H2O(g) to form TiO2(s) and HCl(g) given the standard enthalpies of formation (ΔHf°) shown in the table below. (Include the sign of the value in your answer.) Compound: ΔHf°(kJ/mol) TiCl4(g): -763.2 H2O(g): -241.8 TiO2(s): -944.0 HCl(g): -92.3

Solved • Jul 18, 2019

Enthalpy

Q. When 3.32 g of methane burns in oxygen, 166 kJ of heat is produced. What is the enthalpy of combustion (in kJ) per mole of methane under these conditions? kJ/mol methan

Solved • Jul 18, 2019

Enthalpy

Q. How many moles of butane, C4H10(/), must be burned to produce 162 kJ of heat under standard state conditions? (The heat of combustion for butane is -2855.7 kJ/mol.) t m

Solved • Jul 18, 2019

Enthalpy

Q. Calculate zH (in kJ/mop for the reaction described by the equation. 3 N2H4(/) + 4 03(g) —> 6 NO(g) + 6 H20(/) Id/m

Solved • Jul 18, 2019

Enthalpy

Q. At constant pressure and 25 ° C, What is the ∆rH° for the following reaction 2C2H6 (g) + 7O2 (g) → 4 CO2 (g) + H2O (l) If the complete combustion of 89.4 g of C2H6 liberates -4638 kJ of heat energy?

Solved • Jul 9, 2019