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Author Question: A 12.8 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter with a heat capacity of 5.65 kJ ... (Read 520 times)

yoroshambo

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on: Nov 18, 2019

Question 1

The temperature rises from 25.00 °C to 29.00 °C when 3.50 g of sucrose undergoes combustion in a bomb calorimeter. Calculate ΔrU for the combustion of sucrose in kJ mol-1 sucrose. The heat capacity of the calorimeter is 4.90 kJ °C-1. The molar mass of sugar is 342.3 g mol-1.
◦ 1.92 × 103 kJ mol-1
◦ -1.23 × 103 kJ mol-1
◦ -1.92 × 103 kJ mol-1
◦ 2.35 × 104 kJ mol-1

Question 2

A 12.8 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter with a heat capacity of 5.65 kJ °C-1. Using the information below, determine the final temperature of the calorimeter if the initial temperature is 25.0°C. The molar mass of ethanol is 46.07 g mol-1.

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

◦ 74.2 °C
◦ 53.4 °C
◦ 28.1 °C
◦ 111 °C
◦ 85.7 °C
Chemistry: A Molecular Approach (Canadian) ¦ Tro, Fridgen, Shaw ¦ 2nd Edition
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Marked as best answer by yoroshambo on Nov 18, 2019

Loise Hard

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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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yoroshambo

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Reply 2 on: Nov 18, 2019
Great answer, keep it coming :)

Perkypinki

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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