specific heat of water = 4.18 J/g•°C heat of vaporization of water
... Problems: PLUS review all previous problem sets for additional practice / review!! 1) Draw (& label!) a rough curve (x-axis time, y-axis temperature) for the cooling of water vapor at 125.0oC to ice at -5.0oC. ...
... Problems: PLUS review all previous problem sets for additional practice / review!! 1) Draw (& label!) a rough curve (x-axis time, y-axis temperature) for the cooling of water vapor at 125.0oC to ice at -5.0oC. ...
Physics 202 Homework
... liquid ice (i.e., water) up to 50 ◦ C. So there are three steps to consider. Let’s take them one at a time. First, raise the temperature of the ice: ∆Q = cm∆T = (2000)(m1 )(10) = (20000)(m1 ) Then melt the ice: ∆Q = mLf = (m1 )(335000) Then raise the temperature of the liquid ice: ∆Q = cm∆T = (4186) ...
... liquid ice (i.e., water) up to 50 ◦ C. So there are three steps to consider. Let’s take them one at a time. First, raise the temperature of the ice: ∆Q = cm∆T = (2000)(m1 )(10) = (20000)(m1 ) Then melt the ice: ∆Q = mLf = (m1 )(335000) Then raise the temperature of the liquid ice: ∆Q = cm∆T = (4186) ...
Heat Transfer/ Specific Heat Problems Worksheet
... 2. How much heat is lost when a 64 g piece of copper cools from 375 oC, to 26 oC? (The specific heat of copper is 0.38452 J/g x oC). Place your answer in kJ. 3. The specific heat of iron is 0.4494 J/g x oC. How much heat is transferred when a 4.7 kg piece of iron is cooled from 180 oC to 13 oC? Reme ...
... 2. How much heat is lost when a 64 g piece of copper cools from 375 oC, to 26 oC? (The specific heat of copper is 0.38452 J/g x oC). Place your answer in kJ. 3. The specific heat of iron is 0.4494 J/g x oC. How much heat is transferred when a 4.7 kg piece of iron is cooled from 180 oC to 13 oC? Reme ...
Chapter_7_Energy_and_Phase_Changes_REVISED 2
... - the heat that water takes in/absorbs (2260 joules per gram) to become water vapor - amount of heat needed to change liquid to gas at constant temperature - while water is boiling, the temperature (average KE of molecules) stays the same - Opposite properties when cooling/ releasing energy ...
... - the heat that water takes in/absorbs (2260 joules per gram) to become water vapor - amount of heat needed to change liquid to gas at constant temperature - while water is boiling, the temperature (average KE of molecules) stays the same - Opposite properties when cooling/ releasing energy ...
Introduction to Solar Energy, Lecture 3 ...
... In the previous section we studied the geometry of what is called the direct beam component of the radiation, i.e. that component of the solar irradiance that reaches the collector directly from the sun's apparent position in the sky. But this does not represent all the radiation that reaches the su ...
... In the previous section we studied the geometry of what is called the direct beam component of the radiation, i.e. that component of the solar irradiance that reaches the collector directly from the sun's apparent position in the sky. But this does not represent all the radiation that reaches the su ...
Physics Perspectives of Environments
... Entropy and photosynthesis To produce glucose by photosynthesis, it needs sufficient water not only for the chemical reaction but also for the “exit” of entropy. It is said that the imbalance of the entropycirculation system may cause desertification or other malfunctioning of ...
... Entropy and photosynthesis To produce glucose by photosynthesis, it needs sufficient water not only for the chemical reaction but also for the “exit” of entropy. It is said that the imbalance of the entropycirculation system may cause desertification or other malfunctioning of ...
Thermal Energy & Heat THERMAL ENERGY & MATTER
... Which type of material heats more, one with a high specific heat, or one with a low specific heat? Is WORK 100% efficient? How do you know? ...
... Which type of material heats more, one with a high specific heat, or one with a low specific heat? Is WORK 100% efficient? How do you know? ...
Study of the Dependence Effectiveness of Low
... economically effective only up to temperatures of free air higher then minus 15 °C. At lower temperatures airconditioning off and actually required backup heating system. The technical solutions elaborated in the limits of this article allow this problem to solve also at the expense of switching eve ...
... economically effective only up to temperatures of free air higher then minus 15 °C. At lower temperatures airconditioning off and actually required backup heating system. The technical solutions elaborated in the limits of this article allow this problem to solve also at the expense of switching eve ...
Name Date Class THE FLOW OF ENERGY—HEAT AND WORK
... Use this completion exercise to check your understanding of the concepts and terms that are introduced in this section. Each blank can be completed with a term, short phrase, or number. The energy that flows from a warm object to a cool object is called ...
... Use this completion exercise to check your understanding of the concepts and terms that are introduced in this section. Each blank can be completed with a term, short phrase, or number. The energy that flows from a warm object to a cool object is called ...
MEP-123
... Condensate return Condensate lines need to return via gravity or a condensate pump • Challenges with condensate return when on grade ...
... Condensate return Condensate lines need to return via gravity or a condensate pump • Challenges with condensate return when on grade ...
f21/2509/2009 githua scolastica njoki heat and mass transfer
... Derive an expression for the critical radius of insulation for a radial system Adding insulation to a cylindrical piece or a spherical shell increases the conduction resistance of the insulation layer but decreases the convection resistance of the surface because of the increase in the outer surface ...
... Derive an expression for the critical radius of insulation for a radial system Adding insulation to a cylindrical piece or a spherical shell increases the conduction resistance of the insulation layer but decreases the convection resistance of the surface because of the increase in the outer surface ...
Lab 15. Heat Capacity
... The function of an adiabatic wall is to totally prevent thermal transfer through the walls of the system. In an adiabatic process, the change in internal energy is equal an opposite to the work performed. Unfortunately, the tube we used in the experiment was an open system. The result is that heat e ...
... The function of an adiabatic wall is to totally prevent thermal transfer through the walls of the system. In an adiabatic process, the change in internal energy is equal an opposite to the work performed. Unfortunately, the tube we used in the experiment was an open system. The result is that heat e ...
Specific Heat Capacity - Cobequid Educational Centre
... The heat required to melt the ice comes from the food or drinks in the cooler. Since heat leaves the food, it gets cold. 2. Preventing Frost Damage When a frost is predicted, farmers will turn on the water sprinklers. As the water falls on the plants and starts to freeze, heat is released to the ...
... The heat required to melt the ice comes from the food or drinks in the cooler. Since heat leaves the food, it gets cold. 2. Preventing Frost Damage When a frost is predicted, farmers will turn on the water sprinklers. As the water falls on the plants and starts to freeze, heat is released to the ...
Chapters 19&20
... • Quantity Q + W = ΔEint (change of internal energy) is path-independent • 1st law of thermodynamics: the internal energy of a system increases if heat is added to the system or work is done on the system ...
... • Quantity Q + W = ΔEint (change of internal energy) is path-independent • 1st law of thermodynamics: the internal energy of a system increases if heat is added to the system or work is done on the system ...
Estimation of Atomic Mass from Specific Heat Data
... temperature of one gram of a substance one degree Celsius. Specific heat constants have the units of J/g C. The values of these constants vary greatly. The constant for water is 4.184 J/g C, while the value for copper is 0.385 J/g C. This means that over ten times as much heat would be required t ...
... temperature of one gram of a substance one degree Celsius. Specific heat constants have the units of J/g C. The values of these constants vary greatly. The constant for water is 4.184 J/g C, while the value for copper is 0.385 J/g C. This means that over ten times as much heat would be required t ...
Thermochemistry
... The potential energy of this ball of clay is increased when it is moved from the ground to the top of the wall. b) As the ball falls, its potential energy is converted to kinetic energy. c) When it hits the ground, its kinetic energy falls to zero (since it is no longer moving); some of the energy d ...
... The potential energy of this ball of clay is increased when it is moved from the ground to the top of the wall. b) As the ball falls, its potential energy is converted to kinetic energy. c) When it hits the ground, its kinetic energy falls to zero (since it is no longer moving); some of the energy d ...
Nats 101 S00 #8
... of glass with a vacuum between them, or glass made with lots of air bubbles. Add insulation to the walls. This is based on that fact that different materials have different thermal conductivity. Wood feels warm, or normal, while metal usually feels cold. Actually both are at the same temperature, it ...
... of glass with a vacuum between them, or glass made with lots of air bubbles. Add insulation to the walls. This is based on that fact that different materials have different thermal conductivity. Wood feels warm, or normal, while metal usually feels cold. Actually both are at the same temperature, it ...
Heat, Temperature and Atmospheric Circulations
... • Cricket chirps: temperature must be above 54oF – # of chirps in 8 seconds + 4 = oC ...
... • Cricket chirps: temperature must be above 54oF – # of chirps in 8 seconds + 4 = oC ...
Chapter 16 notes
... Radiator:hot water or steam heat through radiation to the air. Uses a boiler to heat water Electric: electricity heats coils in floor or ceiling by conduction. ...
... Radiator:hot water or steam heat through radiation to the air. Uses a boiler to heat water Electric: electricity heats coils in floor or ceiling by conduction. ...
Chapter16
... Strategy: In this problem we wish to find the change in length of the bridge between a cold winter day and a warm summer day. Use equation 16-4 to determine the change in length. The coefficient of linear expansion for steel is given in Table 16-1. Solution: Insert the given values into equation 16- ...
... Strategy: In this problem we wish to find the change in length of the bridge between a cold winter day and a warm summer day. Use equation 16-4 to determine the change in length. The coefficient of linear expansion for steel is given in Table 16-1. Solution: Insert the given values into equation 16- ...
Heat Transfer WebQuest Visit the Heat Transfer website (http://www
... Click on the picture of the pot. Light the burner and view the animation. What type of heat transfer is occurring? Define it. ...
... Click on the picture of the pot. Light the burner and view the animation. What type of heat transfer is occurring? Define it. ...
Step 4: Cut along the 2 fold lines to make 3 flaps
... energy as heat by the movement of a liquid or gas. Hotter substances become less dense and rise. Example: Wind, Boiling Water ...
... energy as heat by the movement of a liquid or gas. Hotter substances become less dense and rise. Example: Wind, Boiling Water ...
151c15
... kJ/kg. How much of this heat represents work done to expand the water into steam against the pressure of the atmosphere? At T = 100 ºC an p = 1 atm, the density of water is 1.00x103 kg/m3 and the density of steam is 0.600 kg/m3. ...
... kJ/kg. How much of this heat represents work done to expand the water into steam against the pressure of the atmosphere? At T = 100 ºC an p = 1 atm, the density of water is 1.00x103 kg/m3 and the density of steam is 0.600 kg/m3. ...
Solar water heating
Solar water heating (SWH) is the conversion of sunlight into renewable energy for water heating using a solar thermal collector. Solar water heating systems comprise various technologies that are used worldwide increasingly.In a ""close-coupled"" SWH system the storage tank is horizontally mounted immediately above the solar collectors on the roof. No pumping is required as the hot water naturally rises into the tank through thermosiphon flow. In a ""pump-circulated"" system the storage tank is ground- or floor-mounted and is below the level of the collectors; a circulating pump moves water or heat transfer fluid between the tank and the collectors.SWH systems are designed to deliver hot water for most of the year. However, in winter there sometimes may not be sufficient solar heat gain to deliver sufficient hot water. In this case a gas or electric booster is used to heat the water.