16.the temperature of the melted ice to 75°C?How many joules of heat are required to melt 15.0 kg of ice at 0°C and to raisere of the melted ice to 20°C?equired to melt 50.0 kg of ice at 0°C and to17. How many joules of heat need to be removed from 1.25 kg of steam at 115°C tocondense it to water and cool the water to 50°C?18. How many kcal of heat are needed to vaporize 5.00 kg of water at 100 C andraise the temperature of the steam to 145°C?19. How many calories of heat are needed to change 625 g of ice at -24.0C tosteam at 132.0°C?20. How many Btu of heat must be withdrawn from 5.65 lb of steam at 236.0°F tochange it to ice at 12.0°F?How many kilocalories of heat are needed to change 143 N of ethyl alcohol at21.65.0°C to vapor?How many joules of heat does 620 g of mercury require to go froma solid at22.-38.9°C to vapor?Glossaryle temperature. (p. 374)to raise the tem-

Question
Asked Nov 24, 2019
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How many joules of heat does 620 g of mercury require to go from a solid at -38.9 degrees celcius to vapor? 

16.
the temperature of the melted ice to 75°C?
How many joules of heat are required to melt 15.0 kg of ice at 0°C and to raise
re of the melted ice to 20°C?
equired to melt 50.0 kg of ice at 0°C and to
17. How many joules of heat need to be removed from 1.25 kg of steam at 115°C to
condense it to water and cool the water to 50°C?
18. How many kcal of heat are needed to vaporize 5.00 kg of water at 100 C and
raise the temperature of the steam to 145°C?
19. How many calories of heat are needed to change 625 g of ice at -24.0C to
steam at 132.0°C?
20. How many Btu of heat must be withdrawn from 5.65 lb of steam at 236.0°F to
change it to ice at 12.0°F?
How many kilocalories of heat are needed to change 143 N of ethyl alcohol at
21.
65.0°C to vapor?
How many joules of heat does 620 g of mercury require to go from
a solid at
22.
-38.9°C to vapor?
Glossary
le temperature. (p. 374)
to raise the tem-
help_outline

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16. the temperature of the melted ice to 75°C? How many joules of heat are required to melt 15.0 kg of ice at 0°C and to raise re of the melted ice to 20°C? equired to melt 50.0 kg of ice at 0°C and to 17. How many joules of heat need to be removed from 1.25 kg of steam at 115°C to condense it to water and cool the water to 50°C? 18. How many kcal of heat are needed to vaporize 5.00 kg of water at 100 C and raise the temperature of the steam to 145°C? 19. How many calories of heat are needed to change 625 g of ice at -24.0C to steam at 132.0°C? 20. How many Btu of heat must be withdrawn from 5.65 lb of steam at 236.0°F to change it to ice at 12.0°F? How many kilocalories of heat are needed to change 143 N of ethyl alcohol at 21. 65.0°C to vapor? How many joules of heat does 620 g of mercury require to go from a solid at 22. -38.9°C to vapor? Glossary le temperature. (p. 374) to raise the tem-

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Expert Answer

Step 1

Given,

Mass m 620 g
temprature in solid state tg = -38.9° C = 234.1 K
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Mass m 620 g temprature in solid state tg = -38.9° C = 234.1 K

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Step 2

Specific heat of Mercury

C = 0.140 J/gm-K
=273 K
At =i
= 273-234.1
=38.9 K
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C = 0.140 J/gm-K =273 K At =i = 273-234.1 =38.9 K

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Step 3

Required heat to change Mercur...

9, %3D тсAt
=620 x0.14x 38.9
1
=3376.52 J
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9, %3D тсAt =620 x0.14x 38.9 1 =3376.52 J

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