Thermodynamics
... energy to useful work is called a heat engine. A steam engine and an internal combustion engine are both examples of a heat engine You do not need to know the details of how these work. We just draw a very simple diagram. Efficiency = ΔW/Qhot ...
... energy to useful work is called a heat engine. A steam engine and an internal combustion engine are both examples of a heat engine You do not need to know the details of how these work. We just draw a very simple diagram. Efficiency = ΔW/Qhot ...
Notes - hrsbstaff.ednet.ns.ca
... water was 26.5oC. The final temperature of the mixture was 9.7oC. What amount of heat was lost by the water? We are going to use the mass of the water (60.0 grams). The Tf is 9.7oC, the Ti is 26.5oC Now we use the formula: q mcT ...
... water was 26.5oC. The final temperature of the mixture was 9.7oC. What amount of heat was lost by the water? We are going to use the mass of the water (60.0 grams). The Tf is 9.7oC, the Ti is 26.5oC Now we use the formula: q mcT ...
Energy Changes in Matter - Day 1 Introduction to Chemistry and
... Energy can not be created or destroyed. Energy can be converted. PE KE KE PE Total amount of energy in a closed system is constant. Conservation of mass: ...
... Energy can not be created or destroyed. Energy can be converted. PE KE KE PE Total amount of energy in a closed system is constant. Conservation of mass: ...
heat energy - Parkway C-2
... • Form of energy and measured in JOULES • Particles move about more and take up more room if heated – this is why things expand if heated • It is also why substances change from: solids liquids gases when heated Visit www.worldofteaching.com for more free powerpoints ...
... • Form of energy and measured in JOULES • Particles move about more and take up more room if heated – this is why things expand if heated • It is also why substances change from: solids liquids gases when heated Visit www.worldofteaching.com for more free powerpoints ...
Chapter 10
... color is good because: Lightly colored buildings reflect much of the incoming radiant energy. This helps them stay cooler in the summer. Lightly colored objects are also poor emitters, so they retain much of their internal energy during the winter, and stay ...
... color is good because: Lightly colored buildings reflect much of the incoming radiant energy. This helps them stay cooler in the summer. Lightly colored objects are also poor emitters, so they retain much of their internal energy during the winter, and stay ...
Thermodynamics
... Carnot Efficiency Carnot a believed that there was an absolute zero of temperature, from which he figured out that on being cooled to absolute zero, the fluid would give up all its heat energy. Therefore, if it falls only half way to absolute zero from its beginning temperature, it will give up hal ...
... Carnot Efficiency Carnot a believed that there was an absolute zero of temperature, from which he figured out that on being cooled to absolute zero, the fluid would give up all its heat energy. Therefore, if it falls only half way to absolute zero from its beginning temperature, it will give up hal ...
WORKSHOP 2: Dimensional Analysis and
... 7. A rubber stopper weighing 65.4 g is immersed into a graduated cylinder filled with 30.0 mL of liquid. The liquid level then rises to 48.8 mL. Calculate the density of the stopper. 3.48 g/mL 8. If the density of a liquid is known to be 0.785 g/mL, calculate the mass of the liquid if its volume is ...
... 7. A rubber stopper weighing 65.4 g is immersed into a graduated cylinder filled with 30.0 mL of liquid. The liquid level then rises to 48.8 mL. Calculate the density of the stopper. 3.48 g/mL 8. If the density of a liquid is known to be 0.785 g/mL, calculate the mass of the liquid if its volume is ...
The Geosphere
... Heat transfer through the motion of a hot material When a material heats, it expands The expanded material is less dense The material then rises, carrying heat ...
... Heat transfer through the motion of a hot material When a material heats, it expands The expanded material is less dense The material then rises, carrying heat ...
Thermodynamics!!!
... COLD, only a lack of heat Temperature is the measurement of the average kinetic energy of the molecules of a substance Heat always moves from “warm to cold” meaning from something with a higher temperature to something with a lower temperature ...
... COLD, only a lack of heat Temperature is the measurement of the average kinetic energy of the molecules of a substance Heat always moves from “warm to cold” meaning from something with a higher temperature to something with a lower temperature ...
Conductive Thermal Transfer
... (particularly near top of intrusions), lower in lower crustal rocks, very low in the mantle. ...
... (particularly near top of intrusions), lower in lower crustal rocks, very low in the mantle. ...
Thermochemistry
... temperature of 1 g of a substance 1oC. Water has a uniquely high specific heat compared to other substances. ...
... temperature of 1 g of a substance 1oC. Water has a uniquely high specific heat compared to other substances. ...
Thermal energy is another name for ______ A material that
... Thermal energy is another name for _______ ...
... Thermal energy is another name for _______ ...
Measuring the Specific Heat Capacity of Water
... Energy to heat 1kg (1000ml) of water by 1˚C = __________ × 10 = __________ J ...
... Energy to heat 1kg (1000ml) of water by 1˚C = __________ × 10 = __________ J ...
Ch.19 (section 1 only)
... Device that uses heat to perform work Hot Reservoir (e.g. steam) Cool Reservoir (e.g. pool of water) Efficiency is work done per unit of input heat (e = W/QH) • Ex. A heat engine does 100J of work when given 300J from the hot reservoir. The efficiency is 100J/300J = 0.33 = ...
... Device that uses heat to perform work Hot Reservoir (e.g. steam) Cool Reservoir (e.g. pool of water) Efficiency is work done per unit of input heat (e = W/QH) • Ex. A heat engine does 100J of work when given 300J from the hot reservoir. The efficiency is 100J/300J = 0.33 = ...
specific heat
... When you go to the beach, why is the sand hot, but the water is cool on the same hot ...
... When you go to the beach, why is the sand hot, but the water is cool on the same hot ...
AA2 FALL 2005
... Conduction is the process through which heat is diffused to cooler materials as radiation is absorbed. Land surfaces heat quickly, while water bodies can mix and have higher heat capacity. Solids (land) are better conductors than gases (atmosphere). Convection is physical mixing with a strong vertic ...
... Conduction is the process through which heat is diffused to cooler materials as radiation is absorbed. Land surfaces heat quickly, while water bodies can mix and have higher heat capacity. Solids (land) are better conductors than gases (atmosphere). Convection is physical mixing with a strong vertic ...
doc - University of Colorado Boulder
... plant hormone), can have large effects on plant growth and have to be controlled. This can be accomplished using a ______________. At night, low light, or during germination, plants produce _____ (gas) and need ______ (gas) for their metabolism. In order to not exceed toxic levels of this gas in the ...
... plant hormone), can have large effects on plant growth and have to be controlled. This can be accomplished using a ______________. At night, low light, or during germination, plants produce _____ (gas) and need ______ (gas) for their metabolism. In order to not exceed toxic levels of this gas in the ...
151c15
... 2. Mechanical work (W) is done (by converting some of the absorbed heat to mechanical work). 3. Heat (QC) is given off at a lower temperature ...
... 2. Mechanical work (W) is done (by converting some of the absorbed heat to mechanical work). 3. Heat (QC) is given off at a lower temperature ...
SYNOPSES: A gas, completely insulated from its surroundings
... ∆ U is the internal energy of the system. Every equilibrium state of a thermodynamic system is completely described by specific values of some macroscopic variables, also called state variables. Examples of State Variables: (1) Pressure (P) (2) Volume (V) (3) Temperature (T) (4) Mass (m). Calorie is ...
... ∆ U is the internal energy of the system. Every equilibrium state of a thermodynamic system is completely described by specific values of some macroscopic variables, also called state variables. Examples of State Variables: (1) Pressure (P) (2) Volume (V) (3) Temperature (T) (4) Mass (m). Calorie is ...
Document
... 15. How much heat energy is required to heat a 14.75 g sample of ice at -23˚C to steam at 121˚C? Cice = 2.06 J/g˚C Csteam = 2.02 J/g˚C ΔHfus = 6.02 kJ/mol ΔHvap = 40.7 kJ/mol ...
... 15. How much heat energy is required to heat a 14.75 g sample of ice at -23˚C to steam at 121˚C? Cice = 2.06 J/g˚C Csteam = 2.02 J/g˚C ΔHfus = 6.02 kJ/mol ΔHvap = 40.7 kJ/mol ...
Cogeneration
Cogeneration or combined heat and power (CHP) is the use of a heat engine or power station to generate electricity and useful heat at the same time. Trigeneration or combined cooling, heat and power (CCHP) refers to the simultaneous generation of electricity and useful heating and cooling from the combustion of a fuel or a solar heat collector. Cogeneration is a thermodynamically efficient use of fuel. In separate production of electricity, some energy must be discarded as waste heat, but in cogeneration this thermal energy is put to use. All thermal power plants emit heat during electricity generation, which can be released into the natural environment through cooling towers, flue gas, or by other means. In contrast, CHP captures some or all of the by-product for heating, either very close to the plant, or—especially in Scandinavia and Eastern Europe—as hot water for district heating with temperatures ranging from approximately 80 to 130 °C. This is also called combined heat and power district heating (CHPDH). Small CHP plants are an example of decentralized energy. By-product heat at moderate temperatures (100–180 °C, 212–356 °F) can also be used in absorption refrigerators for cooling.The supply of high-temperature heat first drives a gas or steam turbine-powered generator and the resulting low-temperature waste heat is then used for water or space heating as described in cogeneration. At smaller scales (typically below 1 MW) a gas engine or diesel engine may be used. Trigeneration differs from cogeneration in that the waste heat is used for both heating and cooling, typically in an absorption refrigerator. CCHP systems can attain higher overall efficiencies than cogeneration or traditional power plants. In the United States, the application of trigeneration in buildings is called building cooling, heating and power (BCHP). Heating and cooling output may operate concurrently or alternately depending on need and system construction.Cogeneration was practiced in some of the earliest installations of electrical generation. Before central stations distributed power, industries generating their own power used exhaust steam for process heating. Large office and apartment buildings, hotels and stores commonly generated their own power and used waste steam for building heat. Due to the high cost of early purchased power, these CHP operations continued for many years after utility electricity became available.