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Author Question: Many people believe that coffee may be cooled by placing a silver spoon in the coffee. If 250 ml of ... (Read 129 times)

WhattoUnderstand

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on: Jul 8, 2021

Question 1

Lead, water, sulfur and arsenic have specific heats of 0.128, 4.18, 0.706, and 0.329 J g-1°C-1, respectively. Which of the following would need the smallest quantity of heat to change the temperature of 5 g by 10 °C?
◦ lead
◦ water
◦ sulfur
◦ arsenic

Question 2

Many people believe that coffee may be cooled by placing a silver spoon in the coffee. If 250 ml of coffee at 200 °F had a spoon at 70 °F placed in it, what would be the final Celsius temperature of the spoon and coffee, assuming that no heat is lost to the surroundings? The mass of the spoon is 35 g.
◦ 92.8 °C
◦ 72.2 °C
◦ 57.2 °C
◦ 82.0 °C
◦ 199 °C
General Chemistry: Principles and Modern Applications ¦ Petrucci, Herring, Madura, Bissonnette ¦ 11th Edition
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Marked as best answer by WhattoUnderstand on Jul 8, 2021

lou

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Reply #1 on: Jul 8, 2021
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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WhattoUnderstand

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Reply 2 on: Jul 8, 2021
Gracias!

6ana001

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Reply 3 on: Yesterday
Excellent

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