(a) Equation 14.47 shows the reaction of Na with CCl₄. From the following data, confirm the value of ΔrGº = –1478 kJ mol⁻¹ at 298 K. Data: Δ_fG°(NaCl, s) = –384 kJ mol⁻¹; ΔfHº (CCl₄, l) = –128.4 kJ mol⁻¹; Sº(CCl₄, l) = 214 JK⁻¹ mol⁻¹; Sº(C, gr) = +5.6 JK⁻¹ mol⁻¹; Sº(Cl₂, g) = 223 JK⁻¹ mol⁻¹.

(b) Comment on similarities and differences between the structures of b-cristobalite and a noncrystalline silica glass.

Equation 14.47

Transcribed Image Text:

CC14 + 4Na 4NaCl + C A,Gº-1478 ᎪᏳ kJ mol-¹ (14.47)