Author Question: Calculate the energy change for the formation of CaF2(s) from its elements in their standard states ... (Read 82 times)

sheilaspns · **on:** Feb 15, 2020

Question 1

Calculate the lattice energy for MgCl2(s) using a Born-Haber cycle and the following information:

MgCl2(s) → Mg2+(g) + 2 Cl-(g)

?

Mg(s) + Cl2(g) → MgCl2(s)

-641.6 kJ/mol

Mg(s) → Mg(g)

+147.1 kJ/mol

Mg(g) → Mg+(g) + e-

+737.8 kJ/mol

Mg+(g) → Mg2+(g) + e-

+1451.0 kJ/mol

1/2 Cl2(g) → Cl(g)

+121.7 kJ/mol

Cl(g) + e- → Cl-(g)

-348.6 kJ/mol

◦ +2523.7 kJ/mol
◦ +1882.1 kJ/mol
◦ +641.6 kJ/mol
◦ +1240.5 kJ/mol

Question 2

Calculate the energy change for the formation of CaF2(s) from its elements in their standard states and the following information:

Ca(s) + F2(g) → CaF2(s)

?

Ca(s) → Ca(g)

+179.3 kJ/mol

Ca(g) → Ca+(g) + e-

+589.9 kJ/mol

Ca+(g) → Ca2+(g) + e-

+1145 kJ/mol

1/2 F2(g) → F(g)

+79.0 kJ/mol

F(g) + e- → F-(g)

-328.0 kJ/mol

CaF2(s) → Ca2+(g) + 2 F-(g)

+2630 kJ/mol

◦ -1214 kJ/mol
◦ -965 kJ/mol
◦ +4046 kJ/mol
◦ -3286 kJ/mol

gasdhashg · **Reply #1 on:** Feb 15, 2020

A FREE account is required to view all solutions!

Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.

Answer Preview

Only 35% of students answer this correctly