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Author Question: At 2600 K, G = 775 kJ for the vaporization of boron carbide:B4C(s) 4 B(g) + C(s)Find G and ... (Read 361 times)

vicotolentino

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on: Feb 15, 2020

Question 1

At high temperatures boron carbide vaporizes according to the equation

B4C(s) ⇌ 4 B(g) + C(s)


Which equation describes the relationship between ΔG° and ΔG for this reaction?
◦ ΔG = ΔG° + R T ln (pB ∙ [C]/[B4C])
◦ ΔG = ΔG° - 4 R T ln pB
◦ ΔG = ΔG° + 4 R T ln pB
◦ ΔG = ΔG° + R T ln pB

Question 2

At 2600 K, ΔG° = 775 kJ for the vaporization of boron carbide:

B4C(s) ⇌ 4 B(g) + C(s)


Find ΔG and determine if the process is spontaneous if the reaction vessel contains 4.00 mol B4C(s), 0.400 mol of C(s), and B(g) at a partial pressure of 1.0 × 10-5 atm. At this temperature, R T = 21.6 kJ.
◦ ΔG = -220 kJ; spontaneous.
◦ ΔG = -220 kJ; nonspontaneous.
◦ ΔG = -270 kJ; spontaneous.
◦ ΔG = -270 kJ; nonspontaneous.
Chemistry ¦ McMurry, Fay, Robinson ¦ 7th Edition
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Marked as best answer by vicotolentino on Feb 15, 2020

ambernicolefink

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Reply #1 on: Feb 15, 2020
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.
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vicotolentino

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Reply 2 on: Feb 15, 2020
YES! Correct, THANKS for helping me on my review

covalentbond

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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