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91 solutions

Thermochemical Equation

Q. Calculate the change in enthalpy (Delta H rxn) per mole of reagent

Solved • Feb 8, 2020

Thermochemical Equation

Q. How much energy is required to vaporize 158 g of butane (C4H10) at its boiling point, if its Hvap is 24.3 kJ/mol? ( Group of answer choices 66.1 kJ 89.4 kJ 15.1 kJ 38.4 kJ 11.2 kJ

Solved • Jan 16, 2020

Thermochemical Equation

Q. Given the molar enthalpy, how many moles of Mg reacted?

Solved • Dec 29, 2019

Thermochemical Equation

Q. How many kilojoules of heat will be released when exactly 1.58 moles of iron, Fe, is burned to form Fe2O3(s) at standard state conditions? ΔHf(Fe2O3) = -824.2 kJ/mol.

Solved • Dec 5, 2019

Thermochemical Equation

Q. When 15.75 g of Ba (137.3 g/mol) reacts completely with oxygen, 63.5 kJ of heat are released. Determine H for the reaction as written.2 Ba(s)+ O2(g)2 BaO(s)A. -553.6 kJB. -63.5 kJC. -276.8 kJD. -1107 kJ

Solved • Dec 1, 2019

Thermochemical Equation

Q. For the reaction C(s) + O2 => CO2 (g) ΔH°rxn = -393 kJ. How many grams of C(s) must be reacted to release 275 kJ of heat?

Solved • Nov 20, 2019

Thermochemical Equation

Q. Given the thermochemical equation, 2Cu2O(s) 4Cu(s) + O2(g), ΔH = +333.8 kJ/mol, calculate the mass of copper produced when 1.47 × 104 kJ is consumed in this reaction. (a)11.2 kg (b)176 kg (c)44.0 kg (d)334 kg (e)782 kg

Solved • Nov 19, 2019