Blog

Considering the limiting reactant, how much heat is produced at constant pressure if 0.654 g of zinc reacts with 100.0 mL of 0.300 M HCl according to the reaction below? Zn(s) + 2HCl(aq) => ZnCl2(aq) + H2(g);  ΔHo = –153 kJ

Answer the following question. Show the answer on the screen provided. After uploading your exam, take the picture of your work and upload it to Exam 4 Solutions, Extra Credit, and Partial Credit assignment. Your work must reflect the answer provided here. NO CREDIT will be awarded for the answer without work shown. Standard Enthalpy of Formations in kJ/mol at 298.15 K ΔHof ΔHof FeCl3(s)       -334.0     Fe2O3(s)         -742.2  H2O(l)    -285.8             H2O(g)            -241.8            NH4ClO3(s)           -265.2                    N2O(g)        81.6    Use the properties of enthalpy as a state function (version of Hess’s law) and  data above to calculate the enthalpy change for the reaction (Hint: Do not forget about the coefficients):                                4Fe(s)  +  6NH4ClO3(s)  =>   Fe2O3(s)   + 2FeCl3(s)  +  3 N2O(g)  +  12H2O(g)               ΔH = ?  

The following intermolecular forces exist between the particles in the aqueous solution of KBr

Answer the following question. Show the answer on the screen provided. After uploading your exam, take the picture of your work and upload it to Exam 4 Solutions, Extra Credit, and Partial Credit assignment. Your work must reflect the answer provided here. NO CREDIT will be awarded for the answer without work shown. Standard Enthalpy of Formations in kJ/mol at 298.15 K ΔHof ΔHof AlCl3(s)       -704.2.0     Al2O3(s)         -1676 H2O(l)    -285.8             H2O(g)            -241.8            NH4ClO3(s)           -265.2                    N2O(g)        81.6    Use the properties of enthalpy as a state function (version of Hess’s law) and  data above to calculate the enthalpy change for the reaction (Hint: Do not forget about the coefficients):                         6Al(s)  +  6NH4ClO3(s)  =>   2Al2O3(s)   + 2AlCl3(s)  +  3 N2(g)  +  12H2O(g)               ΔH = ?  

Answer the following question. Show the answer on the screen provided. After uploading your exam, take the picture of your work and upload it to Exam 4 Solutions, Extra Credit, and Partial Credit assignment. Your work must reflect the answer provided here. NO CREDIT will be awarded for the answer without work shown. 15.3 g of KClO3 decomposes according to the following balanced equation. Use the stoichiometry and gas laws to determine the volume of O2 formed at 1 atm and 500K. The molar mass for KClO3 is 122.55 g/mol.                 2 KClO3(s)  →  2 KCl(s) + 3 O2(g)

A 164 g sample of neon is placed into a cylinder at 226oC and 332 atm. What is the volume of the cylinder in liters?

Which of the following pure substances has the highest boiling point?  

At constant pressure, the sign of q for the process C3H8(g) => C3H8(l) is____, because______

On the generic phase diagram below, the gas is present at the temperatures and pressures which are the coordinates of the following points:

Which substance in the liquid state has only dipole-dipole and hydrogen bonding?