General Chemistry: Chemistry 1000
... NOTE: Energy is sometimes measured in units of calories where 1 cal=4.184 joules. b. Work is the energy needed to move an object and so is found from the force that must be applied and the distance the object is moved. W = force times distance = f d SI units: ...
... NOTE: Energy is sometimes measured in units of calories where 1 cal=4.184 joules. b. Work is the energy needed to move an object and so is found from the force that must be applied and the distance the object is moved. W = force times distance = f d SI units: ...
Heat Transfer
... Example 19-13: Heat loss through windows. A major source of heat loss from a house is through the windows. Calculate the rate of heat flow through a glass window 2.0 m x 1.5 m in area and 3.2 mm thick, if the temperatures at the inner and outer surfaces are 15.0°C and 14.0°C, respectively. ...
... Example 19-13: Heat loss through windows. A major source of heat loss from a house is through the windows. Calculate the rate of heat flow through a glass window 2.0 m x 1.5 m in area and 3.2 mm thick, if the temperatures at the inner and outer surfaces are 15.0°C and 14.0°C, respectively. ...
Phases of Matter and Phase Changes
... But if you add heat energy or take it away, it causes particles to move faster or slower and thus changes the temp. ...
... But if you add heat energy or take it away, it causes particles to move faster or slower and thus changes the temp. ...
state of matter - Mayfield City Schools
... - These particles are always moving, and it is this movement that helps decide what state of matter exists (solid, liquid, gas, plasma). - The particles have potential and kinetic energy (kinetic as they are moving, and potential as they are potentially attracted or repulsed by each other). - The TO ...
... - These particles are always moving, and it is this movement that helps decide what state of matter exists (solid, liquid, gas, plasma). - The particles have potential and kinetic energy (kinetic as they are moving, and potential as they are potentially attracted or repulsed by each other). - The TO ...
Name
... Part A: Match the terms on the left with the explanations and situations on the right. Some answers may be used more than once and some may not be used at all. A. method of heat transfer where particles collide 1. Heat flow B. heat flows slowly in this type of material 2. Convection 3. Thermal Energ ...
... Part A: Match the terms on the left with the explanations and situations on the right. Some answers may be used more than once and some may not be used at all. A. method of heat transfer where particles collide 1. Heat flow B. heat flows slowly in this type of material 2. Convection 3. Thermal Energ ...
module 7
... counter flow provide alternative arrangements for certain specialized applications. In parallel flow both the hot and cold streams enter the heat exchanger at the same end and travel to the opposite end in parallel streams. Energy is transferred along the length from the hot to the cold fluid so the ...
... counter flow provide alternative arrangements for certain specialized applications. In parallel flow both the hot and cold streams enter the heat exchanger at the same end and travel to the opposite end in parallel streams. Energy is transferred along the length from the hot to the cold fluid so the ...
Chapter 9 and 10
... 7. What is a change of phase, or state? Is this a chemical or physical change? When an object goes from one state of matter (solid, liquid or gas) to another. Physical. 8. Explain the difference between a conductor and an insulator. Include how the electrons are positioned in each. Conductors allow ...
... 7. What is a change of phase, or state? Is this a chemical or physical change? When an object goes from one state of matter (solid, liquid or gas) to another. Physical. 8. Explain the difference between a conductor and an insulator. Include how the electrons are positioned in each. Conductors allow ...
Specific heat
... properties of a thermodynamic system such as temperature, specific heat, and pressure are related to the molecular level of matter, including kinetic or potential energy of atoms ...
... properties of a thermodynamic system such as temperature, specific heat, and pressure are related to the molecular level of matter, including kinetic or potential energy of atoms ...
p250c13
... 250 J worth of work. What is the net heat transferred to the system during this process? ...
... 250 J worth of work. What is the net heat transferred to the system during this process? ...
Heat Lost Heat Gained problems The heat lost by one substance in
... Heat Lost Heat Gained problems The heat lost by one substance in a system is gained by another in the system when there is a difference in temperature between the substances. There is also a heat transfer between the system and its surroundings if they are at different temperatures. ...
... Heat Lost Heat Gained problems The heat lost by one substance in a system is gained by another in the system when there is a difference in temperature between the substances. There is also a heat transfer between the system and its surroundings if they are at different temperatures. ...
Heat Transfer by Conduction
... For glass and most nonporous materials, the thermal conductivities are much lower, from about 0.35 to 3.5. For most liquid k is lower than that for solids, with typical values of about 0.17. k decreases by 3 ~ 4 %t for a 10 ºC rise in temperature, except water. ...
... For glass and most nonporous materials, the thermal conductivities are much lower, from about 0.35 to 3.5. For most liquid k is lower than that for solids, with typical values of about 0.17. k decreases by 3 ~ 4 %t for a 10 ºC rise in temperature, except water. ...
Thermodynamics
... Work done by a gas Suppose you had a piston filled with a specific amount of gas. As you add heat, the temperature rises and thus the volume of the gas expands. The gas then applies a force on the piston wall pushing it a specific displacement. Thus it can be said that a gas can do WORK. ...
... Work done by a gas Suppose you had a piston filled with a specific amount of gas. As you add heat, the temperature rises and thus the volume of the gas expands. The gas then applies a force on the piston wall pushing it a specific displacement. Thus it can be said that a gas can do WORK. ...
Chapter Summary
... In this chapter we looked at the connection between heat, work, and the change in internal energy, and we saw how the laws of thermodynamics can be applied to understand the basic operation of practical devices such as engines, refrigerators, and air conditioners. The First Law of Thermodynamics The ...
... In this chapter we looked at the connection between heat, work, and the change in internal energy, and we saw how the laws of thermodynamics can be applied to understand the basic operation of practical devices such as engines, refrigerators, and air conditioners. The First Law of Thermodynamics The ...
Thermodynamics
... Heat is a form of energy so we can always use Joules. More common in thermodynamics is the calorie: By definition 1 calorie is the amount of heat required to change the temperature of 1 gram of water 1°C. ...
... Heat is a form of energy so we can always use Joules. More common in thermodynamics is the calorie: By definition 1 calorie is the amount of heat required to change the temperature of 1 gram of water 1°C. ...
ph202_overhead_ch15
... • A measure of the disorder (or randomness) of a system • For a reversible the change in entropy is measured as the ratio of heat gained to temperature DS = (Q/T)R = Sfinal - Sinitial – When heat energy is gained by a system, entropy is gained by the system (and lost by the surrounding environment) ...
... • A measure of the disorder (or randomness) of a system • For a reversible the change in entropy is measured as the ratio of heat gained to temperature DS = (Q/T)R = Sfinal - Sinitial – When heat energy is gained by a system, entropy is gained by the system (and lost by the surrounding environment) ...
Brewing Week 4
... Beer, dispensed at a rate of 0.03 kg/s, is chilled in an ice bath from 18C to 8C. The beer flows through a stainless steel cooling coil with a 10 mm o.d., 9 mm i.d., and thermal conductivity of 100 W/m.K. The specific heat of the beer is 4.2 kJ/kg.K and the film heat transfer coefficients on the p ...
... Beer, dispensed at a rate of 0.03 kg/s, is chilled in an ice bath from 18C to 8C. The beer flows through a stainless steel cooling coil with a 10 mm o.d., 9 mm i.d., and thermal conductivity of 100 W/m.K. The specific heat of the beer is 4.2 kJ/kg.K and the film heat transfer coefficients on the p ...
Heat exchanger
A heat exchanger is a device used to transfer heat between one or more fluids. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural-gas processing, and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air.