www.singaporestudent.com Heat Energy Part 4 Calculation on Heat Energy by Cecil Sie For Sec 3 and Sec 4 Students taking Pure Physics or Combined Science
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Heat EnergyPart 4
Calculation on Heat Energyby Cecil Sie
For Sec 3 and Sec 4 Studentstaking Pure Physics or Combined Science
Heat Absorbed and Heat Released
Qabsorbed Q released
The amount of heat energy absorbedis the same as the amount of heat energy released.
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Question 4aA metal bar with mass of 200 gram and temperature 3000C is put into 1200 gram of water withtemperature of 200C. After sometime both metal bar and the water reach final temperature of 250C.Specific heat capacity of water is 4200 Joule / kg Kelvin. What is the specific heat capacity of themetal bar ?
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Question 4aA metal bar with mass of 200 gram and temperature 3000C is put into 1200 gram of water withtemperature of 200C. After sometime both metal bar and the water reach final temperature of 250C.Specific heat capacity of water is 4200 Joule / kg Kelvin. What is the specific heat capacity of themetal bar ?
Answer:The object that releases heat is _______________ .The object that absorb heat is ________________ .Heat received by _______________ is equal to heat released by _____________ .
Write down your answerin a piece of paperand check you answer on the next page
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Question 4aA metal bar with mass of 200 gram and temperature 3000C is put into 1200 gram of water withtemperature of 200C. After sometime both metal bar and the water reach final temperature of 250C.Specific heat capacity of water is 4200 Joule / kg Kelvin. What is the specific heat capacity of themetal bar ?
Answer:The object that releases heat is metal bar .The object that absorb heat is water .Heat received by water is equal to heat released by metal bar .
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Question 4aA metal bar with mass of 200 gram and temperature 3000C is put into 1200 gram of water withtemperature of 200C. After sometime both metal bar and the water reach final temperature of 250C.Specific heat capacity of water is 4200 Joule / kg Kelvin. What is the specific heat capacity of themetal bar ?
Calculation for water :θ = ________ 0C = ________ Kelvinc = ________ Joule / kg Kelvinm = ________ kg
Use the formula Q mcQ = ________ JouleHeat absorbed by water = ________ Joule
Write down your answerin a piece of paperand check you answer on the next page
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Question 4aA metal bar with mass of 200 gram and temperature 3000C is put into 1200 gram of water withtemperature of 200C. After sometime both metal bar and the water reach final temperature of 250C.Specific heat capacity of water is 4200 Joule / kg Kelvin. What is the specific heat capacity of themetal bar ?
Calculation for water :θ = 5 0C = 5 Kelvinc = 4200 Joule / kg Kelvinm = 1.2 kg
Use the formula Q mcQ = 25200 JouleHeat absorbed by water = 25200 Joule
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Question 4aA metal bar with mass of 200 gram and temperature 3000C is put into 1200 gram of water withtemperature of 200C. After sometime both metal bar and the water reach final temperature of 250C.Specific heat capacity of water is 4200 Joule / kg Kelvin. What is the specific heat capacity of themetal bar ?
Use the formula Q mcQ = 25200 JouleHeat absorbed by water = 25200 Joule
Metal bar water25200 joule
Calculation for metal bar :Heat released by metal bar = ________ JouleQ = ________ Jouleθ = ________ 0C = ________ Kelvinm = ________ kg
Write down your answerin a piece of paperand check you answer on the next page
Download more power point presentation from www.singaporestudent.com
Question 4aA metal bar with mass of 200 gram and temperature 3000C is put into 1200 gram of water withtemperature of 200C. After sometime both metal bar and the water reach final temperature of 250C.Specific heat capacity of water is 4200 Joule / kg Kelvin. What is the specific heat capacity of themetal bar ?
Calculation for metal bar :Heat released by metal bar = 25200 JouleQ = 25200 Jouleθ = 275 0C = 275 Kelvinm = 0.2 kg
Use the formula cQm
, so c = _________ Joule / kg Kelvin
The specific heat capacity of the metal bar is __________ Joule / kg Kelvin.
Write down your answerin a piece of paperand check you answer on the next page
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Question 4aA metal bar with mass of 200 gram and temperature 3000C is put into 1200 gram of water withtemperature of 200C. After sometime both metal bar and the water reach final temperature of 250C.Specific heat capacity of water is 4200 Joule / kg Kelvin. What is the specific heat capacity of themetal bar ?
Calculation for metal bar :Heat released by metal bar = 25200 JouleQ = 25200 Jouleθ = 275 0C = 275 Kelvinm = 0.2 kg
Use the formula cQm
, so c = 458.18 Joule / kg Kelvin
The specific heat capacity of the metal bar is 458.18 Joule / kg Kelvin.
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Question 4bTo answer this question, use the formula Qabsorbed Q released
210 gram of titanium metal with the temperature of 1500C is put into water 200C. The finaltemperature of both the titanium metal and water is 300C. Calculate the mass of water. Specificheat capacity of water = 4200 Joule / kg Kelvin. Specific heat capacity of titanium = 520 joule / kgKelvin.
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Question 4bTo answer this question, use the formula Qabsorbed Q released
210 gram of titanium metal with the temperature of 1500C is put into water 200C. The finaltemperature of both the titanium metal and water is 300C. Calculate the mass of water. Specificheat capacity of water = 4200 Joule / kg Kelvin. Specific heat capacity of titanium = 520 joule / kgKelvin.
Calculate heat released by titanium using Q mcHeat released by titanium = ___________ joule
Write down your answerin a piece of paperand check you answer on the next page
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Question 4bTo answer this question, use the formula Qabsorbed Q released
210 gram of titanium metal with the temperature of 1500C is put into water 200C. The finaltemperature of both the titanium metal and water is 300C. Calculate the mass of water. Specificheat capacity of water = 4200 Joule / kg Kelvin. Specific heat capacity of titanium = 520 joule / kgKelvin.
Calculate heat released by titanium using Q mcHeat released by titanium = 13104 joule
Qabsorbed QreleasedHeat absorbed by water = ___________ joule
Calculate the mass of water using mQc
mass of water = _______ kg.
Titanium1500C
Water200C
Heat energy
Write down your answerin a piece of paperand check you answer on the next page
Call 90885633 to have math / phys / chem tuition
Question 4bTo answer this question, use the formula Qabsorbed Q released
210 gram of titanium metal with the temperature of 1500C is put into water 200C. The finaltemperature of both the titanium metal and water is 300C. Calculate the mass of water. Specificheat capacity of water = 4200 Joule / kg Kelvin. Specific heat capacity of titanium = 520 joule / kgKelvin.
Calculate heat released by titanium using Q mcHeat released by titanium = 13104 joule
Qabsorbed Qreleased
Heat absorbed by water = 13104 joule
Calculate the mass of water using mQc
mass of water = 0.312 kg.
Titanium1500C
Water200C
Heat energy
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Question 4c1200C mercury is poured into a beaker made from pyrex glass with a temperature of 200C. The finaltemperature of both the beaker and the mercury is 400C. The mass of the beaker is 56 gram.Specific heat capacity of pyrex glass is 750 joule / kg Kelvin. Specific heat capacity of mercury is140 joule / kg Kelvin. What is the mass of the mercury ?
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Question 4c1200C mercury is poured into a beaker made from pyrex glass with a temperature of 200C. The finaltemperature of both the beaker and the mercury is 400C. The mass of the beaker is 56 gram.Specific heat capacity of pyrex glass is 750 joule / kg Kelvin. Specific heat capacity of mercury is140 joule / kg Kelvin. What is the mass of the mercury ?
Answer :The object that releases heat is _______________ .The object that absorb heat is ________________ .Heat received by _______________ is equal to heat released by _____________ .
Write down your answerin a piece of paperand check you answer on the next page
Call 90885633 to have math / phys / chem tuition
Question 4c1200C mercury is poured into a beaker made from pyrex glass with a temperature of 200C. The finaltemperature of both the beaker and the mercury is 400C. The mass of the beaker is 56 gram.Specific heat capacity of pyrex glass is 750 joule / kg Kelvin. Specific heat capacity of mercury is140 joule / kg Kelvin. What is the mass of the mercury ?
Answer :The object that releases heat is mercury .The object that absorb heat is pyrex glass .Heat received by pyrex glass is equal to heat released by mercury .
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Question 4c1200C mercury is poured into a beaker made from pyrex glass with a temperature of 200C. The finaltemperature of both the beaker and the mercury is 400C. The mass of the beaker is 56 gram.Specific heat capacity of pyrex glass is 750 joule / kg Kelvin. Specific heat capacity of mercury is140 joule / kg Kelvin. What is the mass of the mercury ?
Answer :The object that releases heat is mercury .The object that absorb heat is pyrex glass .Heat received by pyrex glass is equal to heat released by mercury .
Calculate heat absorbed by pyrex glass using Q mcHeat absorbed by pyrex glass = __________ joule
Write down your answerin a piece of paperand check you answer on the next page
to subscribe to my newsletter, send an empty email to [email protected]
Question 4c1200C mercury is poured into a beaker made from pyrex glass with a temperature of 200C. The finaltemperature of both the beaker and the mercury is 400C. The mass of the beaker is 56 gram.Specific heat capacity of pyrex glass is 750 joule / kg Kelvin. Specific heat capacity of mercury is140 joule / kg Kelvin. What is the mass of the mercury ?
Answer :The object that releases heat is mercury .The object that absorb heat is pyrex glass .Heat received by pyrex glass is equal to heat released by mercury .
Calculate heat absorbed by pyrex glass using Q mcHeat absorbed by pyrex glass = 840 joule
Qabsorbed Q released
Heat released by mercury = __________ joule
Mercury1200C
Pyrex glass200C
Heat energy
Write down your answerin a piece of paperand check you answer on the next page
Call 90885633 to have math / phys / chem tuition
Question 4c1200C mercury is poured into a beaker made from pyrex glass with a temperature of 200C. The finaltemperature of both the beaker and the mercury is 400C. The mass of the beaker is 56 gram.Specific heat capacity of pyrex glass is 750 joule / kg Kelvin. Specific heat capacity of mercury is140 joule / kg Kelvin. What is the mass of the mercury ?
Answer :The object that releases heat is mercury .The object that absorb heat is pyrex glass .Heat received by pyrex glass is equal to heat released by mercury .
Calculate heat absorbed by pyrex glass using Q mcHeat absorbed by pyrex glass = 840 joule
Qabsorbed Q released
Heat released by mercury = 840 joule
Calculate the mass of mercury using mQ
cmass of mercury = _________ kg
Mercury1200C
Pyrex glass200C
Heat energy
Download more power point presentation from www.singaporestudent.com
Question 4c1200C mercury is poured into a beaker made from pyrex glass with a temperature of 200C. The finaltemperature of both the beaker and the mercury is 400C. The mass of the beaker is 56 gram.Specific heat capacity of pyrex glass is 750 joule / kg Kelvin. Specific heat capacity of mercury is140 joule / kg Kelvin. What is the mass of the mercury ?
Answer :The object that releases heat is mercury .The object that absorb heat is pyrex glass .Heat received by pyrex glass is equal to heat released by mercury .
Calculate heat absorbed by pyrex glass using Q mcHeat absorbed by pyrex glass = 840 joule
Qabsorbed Q released
Heat released by mercury = 840 joule
Calculate the mass of mercury using mQ
cmass of mercury = 0.075 kg
Mercury1200C
Pyrex glass200C
Heat energy
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Question 4dA piece of platinum 1950C, mass 195 gram is put into 250C seawater, mass 104 gram. The finaltemperature of the seawater and platinum is 350C. Specific heat capacity of platinum is 130 joule /kg Kelvin. What is the specific heat capacity of seawater?
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Question 4dA piece of platinum 1950C, mass 195 gram is put into 250C seawater, mass 104 gram. The finaltemperature of the seawater and platinum is 350C. Specific heat capacity of platinum is 130 joule /kg Kelvin. What is the specific heat capacity of seawater?
Answer Heat energy released by platinum
Q 0.195 170 130 4309.5
Heat energy absorbed by sea water =
c4309.5
0.104 104143.75
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Question 4e1500 gram of water 250C is poured into a hot frying pan 950C. The final temperature of the water and the frying pan is 300C. The specific heat capacity of water is 4200 joule / kgKelvin. What is the heat capacity of the frying pan?
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Question 4e1500 gram of water 250C is poured into a hot frying pan 950C. The final temperature of the water and the frying pan is 300C. The specific heat capacity of water is 4200 joule / kgKelvin. What is the heat capacity of the frying pan?
AnswerEnergy absorbed by water = (1.5) (4200) (30-25)
= 31500 jouleEnergy released by frying pan = 31500 joule
Heat capacity of the frying pan = 3150 / (95-30) = 484.62 joule / Kelvin
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Heat Energy
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