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Author Question: How much energy must be removed from a 94.4 g sample of benzene (molar mass = 78.11 g mol-1) at ... (Read 373 times)

formula1

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on: Nov 18, 2019

Question 1

How much energy is required to heat 87.1 g acetone (molar mass = 58.08 g mol-1) from a solid at -154.0 °C to a liquid at -42. 0°C? The following physical data may be useful:

ΔfusH = 7.27 kJ mol-1
Cliq = 2.16 J g-1 °C-1
Cgas = 1.29 J g-1 °C-1
Csol = 1.65 J g-1 °C-1
Tmelting = -95.0 °C

◦ 8.48 kJ
◦ 32.2 kJ
◦ 9.97 kJ
◦ 29.4 kJ
◦ 18.5 kJ

Question 2

How much energy must be removed from a 94.4 g sample of benzene (molar mass = 78.11 g mol-1) at 322.0 K to solidify the sample and lower the temperature to 205.0 K? The following physical data may be useful:

ΔvapH = 33.9 kJ mol-1
ΔfusH = 9.8 kJ mol-1
Cliq = 1.73 J g-1 °C-1
Cgas = 1.06 J g-1 °C-1
Csol = 1.51 J g-1 °C-1
Tmelting = 279.0 K
Tboiling = 353.0 K

◦ 70.2 kJ
◦ 17.6 kJ
◦ 10.5 kJ
◦ 11.8 kJ
◦ 29.4 kJ
Chemistry: A Molecular Approach (Canadian) ¦ Tro, Fridgen, Shaw ¦ 2nd Edition
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Marked as best answer by formula1 on Nov 18, 2019

HandsomeMarc

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Reply #1 on: Nov 18, 2019
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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Bob Rick

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Reply #2 on: Apr 19, 2022
thanks!!!


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