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Author Question: The figure shows a graph of the temperature of a pure substance as a function of time as heat is ... (Read 36 times)

kfurse

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on: Oct 11, 2019

Question 1

Some properties of a certain glass are listed here:

Density2300 kg/m3
Specific heat capacity840 J/kg ∙ °C
Coefficient of thermal expansion8.5 × 10-6 (°C)-1
Thermal conductivity0.80 W/m ∙ °C

A glass window pane is 2.7 m high, 2.4 m wide, and 9.0 mm thick. The temperature at the inner surface of the glass is and at the outer surface 4°C. How much heat is lost each hour through the window?
◦ 8.6 J
◦ 8.6 × 103 J
◦ 3.1 × 107 J
◦ 3.1 × 104 J
◦ 3.1 × 105 J

Question 2

The figure shows a graph of the temperature of a pure substance as a function of time as heat is added to it at a constant rate in a closed container. If LF is the latent heat of fusion of this substance and LV is its latent heat of vaporization, what is the value of the ratio LV/LF?



◦ 1.5
◦ 4.5
◦ 3.5
◦ 5.0
◦ 7.2
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Marked as best answer by kfurse on Oct 11, 2019

cadimas

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Reply #1 on: Oct 11, 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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kfurse

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Reply #2 on: Oct 11, 2019
Thanks


cadimas

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Reply #3 on: Oct 11, 2019
Welcome :)


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