sanpedro
09-04-2007, 01:38 PM
http://www.dohaiss.net/vb/upload/userimages/371/untitled.jpg
Use the following equations to solve the questions:
q = m (T)Cp
Latent Heat Of Vaporization: ((liquid - gas transitions)
Qv = ± m Lv
Latent Heat Of Fusion: (solid - liquid transitions)
Qf = ± m Lf
Answer the following questions.
1._____________is heat transfer by direct contact of molecules.
2. Faster moving molecules ___________ with slower moving molecules, causing the slower moving molecules to _______ ______ and ___________ with other slow moving molecules.
3. Conduction can take place in ______,______,and _______.
4. Substances that are able to transfer heat are known as______
5. _____,______,______and _____are examples of good heat conductors.
6. In general ________ are good heat conductors.
7. _____ do not conduct heat easily. ____,____and _____ are good examples.
8. Explain why handles of pots and pans should be made of wood or plastic instead of iron or aluminum.____________________________________.
9. In very cold weather , why is it best to dress in layers of clothing to keep warm?____________
10.What is radiation?__________________.
11.Name four examples of radiation._______, _______, ________ and ________.
Problem:
1. How much heat released when steam of mass 1 gm at 1000 C converted to ice at 00C? `L' of condensation of steam is 540 calorie / gm, freezing of water is 80 calorie / gm and specific heat of water is 1 calorie / gm 0C.
2. How many calories of heat are required to raise the temperature of 550 g of water from 12.0 oC to 18.0 oC? (remember the specific heat of water is 1.00 cal/g x oC)
3. How much heat is lost when a 640 g piece of copper cools from 375 oC, to 26 oC? (The specific heat of copper is 0.38452 J/g x oC)
4. The specific heat of iron is 0.4494 J/g x oC. How much heat is transferred when a 24.7 kg iron ingot is cooled from 880 oC to 13 oC?
5. How many degrees would the temperature of a 450 g ingot of iron increase if 7600 J of energy are applied to it? (The specific heat of iron is0.4494 J/g x oC)
6. A 250 g sample of water with an initial temperature of 98.8 oC loses 7500 joules of heat. What is the final temperature of the water? (Remember, final temp = initial temp - change in temp)
6. Copper has a specific heat of 0.38452 J/g x oC. How much change in temperature would the addition of 35 000 Joules of heat have on a 538.0 gram sample of copper?
Resources:
Heat transfer:
http://sol.sci.uop.edu/~jfalward/heattransfer/heattransfer.html
http://www.emints.org/ethemes/resources/S00001582.shtml
http://www.revision-notes.co.uk/revision/680.html
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heat.html#c1
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/inteng.html#c2
http://en.wikipedia.org/wiki/Heat_conduction
http://en.wikipedia.org/wiki/Thermal_conductivity
http://www.apqj64.dsl.pipex.com/sfa/id81.htm
http://www.jhu.edu/~virtlab/conduct/conduct.htm
http://mathworld.wolfram.com/HeatConductionEquation.html
http://www.efunda.com/formulae/heat_transfer/convection/overview_conv.cfm
http://home.att.net/~cat4a/heat-IV.htm
http://en.wikipedia.org/wiki/Convection
http://www.pa.uky.edu/~sciworks/heat/preview/conv0.htm
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatcond.html#c1
Resources:
Specific latent heat:
http://www.physchem.co.za/Heat/Latent.htm
http://www.sasked.gov.sk.ca/docs/physics/u4b2phy.html
http://sol.sci.uop.edu/~jfalward/specificandlatentheats/specificandlatentheats.html
http://www.sei.ie/index.asp?locID=503&docID=-1 (problems)
http://www.sei.ie/index.asp?locID=502&docID=-1
http://phoenix.phys.clemson.edu/labs/223/spheat/index.html
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/inteng.html#c2
http://en.wikipedia.org/wiki/Heat_conduction
http://en.wikipedia.org/wiki/Thermal_conductivity
http://www.apqj64.dsl.pipex.com/sfa/id81.htm
http://www.jhu.edu/~virtlab/conduct/conduct.htm
http://mathworld.wolfram.com/HeatConductionEquation.html
http://www.efunda.com/formulae/heat_transfer/convection/overview_conv.cfm
http://home.att.net/~cat4a/heat-IV.htm
http://en.wikipedia.org/wiki/Convection
http://www.pa.uky.edu/~sciworks/heat/preview/conv0.htm
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatcond.html#c1
Use the following equations to solve the questions:
q = m (T)Cp
Latent Heat Of Vaporization: ((liquid - gas transitions)
Qv = ± m Lv
Latent Heat Of Fusion: (solid - liquid transitions)
Qf = ± m Lf
Answer the following questions.
1._____________is heat transfer by direct contact of molecules.
2. Faster moving molecules ___________ with slower moving molecules, causing the slower moving molecules to _______ ______ and ___________ with other slow moving molecules.
3. Conduction can take place in ______,______,and _______.
4. Substances that are able to transfer heat are known as______
5. _____,______,______and _____are examples of good heat conductors.
6. In general ________ are good heat conductors.
7. _____ do not conduct heat easily. ____,____and _____ are good examples.
8. Explain why handles of pots and pans should be made of wood or plastic instead of iron or aluminum.____________________________________.
9. In very cold weather , why is it best to dress in layers of clothing to keep warm?____________
10.What is radiation?__________________.
11.Name four examples of radiation._______, _______, ________ and ________.
Problem:
1. How much heat released when steam of mass 1 gm at 1000 C converted to ice at 00C? `L' of condensation of steam is 540 calorie / gm, freezing of water is 80 calorie / gm and specific heat of water is 1 calorie / gm 0C.
2. How many calories of heat are required to raise the temperature of 550 g of water from 12.0 oC to 18.0 oC? (remember the specific heat of water is 1.00 cal/g x oC)
3. How much heat is lost when a 640 g piece of copper cools from 375 oC, to 26 oC? (The specific heat of copper is 0.38452 J/g x oC)
4. The specific heat of iron is 0.4494 J/g x oC. How much heat is transferred when a 24.7 kg iron ingot is cooled from 880 oC to 13 oC?
5. How many degrees would the temperature of a 450 g ingot of iron increase if 7600 J of energy are applied to it? (The specific heat of iron is0.4494 J/g x oC)
6. A 250 g sample of water with an initial temperature of 98.8 oC loses 7500 joules of heat. What is the final temperature of the water? (Remember, final temp = initial temp - change in temp)
6. Copper has a specific heat of 0.38452 J/g x oC. How much change in temperature would the addition of 35 000 Joules of heat have on a 538.0 gram sample of copper?
Resources:
Heat transfer:
http://sol.sci.uop.edu/~jfalward/heattransfer/heattransfer.html
http://www.emints.org/ethemes/resources/S00001582.shtml
http://www.revision-notes.co.uk/revision/680.html
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heat.html#c1
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/inteng.html#c2
http://en.wikipedia.org/wiki/Heat_conduction
http://en.wikipedia.org/wiki/Thermal_conductivity
http://www.apqj64.dsl.pipex.com/sfa/id81.htm
http://www.jhu.edu/~virtlab/conduct/conduct.htm
http://mathworld.wolfram.com/HeatConductionEquation.html
http://www.efunda.com/formulae/heat_transfer/convection/overview_conv.cfm
http://home.att.net/~cat4a/heat-IV.htm
http://en.wikipedia.org/wiki/Convection
http://www.pa.uky.edu/~sciworks/heat/preview/conv0.htm
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatcond.html#c1
Resources:
Specific latent heat:
http://www.physchem.co.za/Heat/Latent.htm
http://www.sasked.gov.sk.ca/docs/physics/u4b2phy.html
http://sol.sci.uop.edu/~jfalward/specificandlatentheats/specificandlatentheats.html
http://www.sei.ie/index.asp?locID=503&docID=-1 (problems)
http://www.sei.ie/index.asp?locID=502&docID=-1
http://phoenix.phys.clemson.edu/labs/223/spheat/index.html
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/inteng.html#c2
http://en.wikipedia.org/wiki/Heat_conduction
http://en.wikipedia.org/wiki/Thermal_conductivity
http://www.apqj64.dsl.pipex.com/sfa/id81.htm
http://www.jhu.edu/~virtlab/conduct/conduct.htm
http://mathworld.wolfram.com/HeatConductionEquation.html
http://www.efunda.com/formulae/heat_transfer/convection/overview_conv.cfm
http://home.att.net/~cat4a/heat-IV.htm
http://en.wikipedia.org/wiki/Convection
http://www.pa.uky.edu/~sciworks/heat/preview/conv0.htm
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatcond.html#c1