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Author Question: A 21.8 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter according to the following ... (Read 203 times)

deesands

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on: Nov 18, 2019

Question 1

A chemist wishes to calibrate a bomb calorimeter, so she combusts 5.58 g of 4-pentenoic acid, ΔcombustionU = -26.77 kJ g-1, which causes a temperature change from 23.4 °C to 38.9 °C. What should the chemist report for the value of Ccal?
◦ 6.10 kJ °C-1
◦ 9.64 kJ °C-1
◦ 17.5 kJ °C-1
◦ 7.61 kJ °C-1
◦ 28.7 kJ °C-1

Question 2

A 21.8 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter according to the following reaction. If the temperature rises from 25.0 °C to 62.3 °C, determine the heat capacity of the calorimeter. The molar mass of ethanol is 46.07 g mol-1.

C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(g)DrU = -1235 kJ mol-1

◦ 4.99 kJ °C-1
◦ 33.1 kJ °C-1
◦ 63.7 kJ °C-1
◦ 5.65 kJ °C-1
◦ 15.7 kJ °C-1
Chemistry: A Molecular Approach (Canadian) ¦ Tro, Fridgen, Shaw ¦ 2nd Edition
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Marked as best answer by deesands on Nov 18, 2019

gcook

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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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deesands

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Reply 2 on: Nov 18, 2019
Excellent

jackie

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Reply 3 on: Yesterday
Wow, this really help

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