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Author Question: Calculate the internal energy change, rU, for the combustion of 9.467 g of L-alanine (C3H7NO2, molar ... (Read 171 times)

crobinson2013

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on: Nov 18, 2019

Question 1

Calculate the internal energy change, ΔrU, for the combustion of 29.3 g of vitamin C (C6H8O6, molar mass = 176.124 g mol-1) if the combustion inside a bomb calorimeter, Ccal = 8.31 kJ °C-1, causes a temperature change from 21.5 °C to 68.3 °C.
◦ -1.67 × 102 kJ mol-1
◦ -1.78 × 103 kJ mol-1
◦ -6.03 × 103 kJ mol-1
◦ -2.34 × 103 kJ mol-1
◦ -9.19 × 102 kJ mol-1

Question 2

Calculate the internal energy change, ΔrU, for the combustion of 9.467 g of L-alanine (C3H7NO2, molar mass = 89.094 g mol-1) if the combustion inside a bomb calorimeter, Ccal = 7.83 kJ °C-1, causes a temperature change from 24.7 °C to 46.1 °C.
◦ -3.48 × 103 kJ mol-1
◦ -1.58 × 103 kJ mol-1
◦ -8.60 × 102 kJ mol-1
◦ 6.14 × 103 kJ mol-1
◦ 3.84 × 103 kJ mol-1
Chemistry: A Molecular Approach (Canadian) ¦ Tro, Fridgen, Shaw ¦ 2nd Edition
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Marked as best answer by crobinson2013 on Nov 18, 2019

xMRAZ

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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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crobinson2013

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Reply 2 on: Nov 18, 2019
Thanks for the timely response, appreciate it

ghepp

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Reply 3 on: Yesterday
Gracias!

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