Consider the following melting point data:CompoundNaClMgCl2AlCl3SiClPCl3SCl2Cl2 mp(°C)801708190−70−91−78−101CompoundNaFMgF2AlF3SiF4PF5SF6F2mp(°C)99713961040−90−94−56−220Account for the trends in melting points in terms of interparticle forces.

Answered: Consider the following melting point…

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter9: Liquids And Solids

Section: Chapter Questions

Problem 137CP

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Dry ice, CO2(s) , does not melt at atmospheric pressure. It sublimes at a temperature of 78 °C. What is the lowest pressure at which CO2(s) will melt to give CO2(l) ? At approximately what temperature will this occur? (See Figure 10.34 for the phase diagram.)
The phase diagram for water over a relative narrow pressure and temperature range is given in Figure 9.19. A phase diagram over a considerably wider range of temperature and pressure (kbar) is given nearby. This phase diagram illustrates the polymorphism of ice, the existence of a solid in more than one form. In this case, Roman numerals are used to designate each polymorphic form. For example, Ice I, ordinary ice, is the form that exists under ordinary pressures. The other forms exist only at higher pressures, in some cases extremely high pressure such as Ice VII and Ice VIII. Using the phase diagram, give the approximate P and T conditions at the triple point for Ice III, Ice V, and liquid water. Determine the approximate temperature and pressure for the triple point for Ices VI, VII, and VIII. What is anomalously different about the fusion curves for Ice VI and Ice VII compared to that of Ice I? What phases exist at 8 kbar and 20 °C? At a constant temperature of −10 °C, start at 3 kbar and increase the pressure to 7 kbar. Identify all the phase changes that occur sequentially as these conditions change. Explain why there is no triple point for the combination of Ice VII, Ice VIII, and liquid water.

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Compound	NaCl	MgCl₂	AlCl₃	SiCl	PCl₃	SCl₂	Cl₂
mp(°C)	801	708	190	−70	−91	−78	−101
Compound	NaF	MgF₂	AlF₃	SiF₄	PF₅	SF₆	F₂
mp(°C)	997	1396	1040	−90	−94	−56	−220

Consider the following melting point data: Compound NaCl MgCl2 AlCl3 SiCl PCl3 SCl2 Cl2 mp(°C) 801 708 190 −70 −91 −78 −101 Compound NaF MgF2 AlF3 SiF4 PF5 SF6 F2 mp(°C) 997 1396 1040 −90 −94 −56 −220 Account for the trends in melting points in terms of interparticle forces.