Chapter 8. Heat. Matter contains thermal energy, not heat. Heat is the thermal energy in transit. Heat is the thermal energy transferred from one object to another due to a temperature difference. Heat is the to the total kinetic energy of the atoms or molecules.
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Matter contains thermal energy, not heat.
Heat is the thermal energy in transit.
Heat is the thermal energy transferred from one object to another due to a temperature difference.
Heat is the to the total kinetic energy of the atoms or molecules.
Heat is measured in joules
Celsius to Kelvin
Fahrenheit to Celsius
Celsius to Fahrenheit
Kelvin to Celsius
Here's a trick for converting Celsius to Fahrenheit in your head:1) double the Celsius temperature 2) subtract one tenth of this value 3) add 32 EXAMPLE: let's use 30 degrees C as an example. 1) double the Celsius temperature (2 x 30 = 60) 2) subtract one tenth of this value (60 - 6 = 54) 3) add 32 (54 + 32 = 86 degrees F)
Heat capacity as the amount of energy needed to change the temperature of a material by one degree.
How much heat is needed to raise the temperature of 30 kg of liquid water from 10 0C to 20 0C ?
= 30 Kg x 4.19 J/kg 0C x (20-10)0C
A 2.0-kg aluminum pan is heated on the stove from 20°C to 110°C. How much heat had to be transferred to the aluminum? The specific heat capacity of aluminum is 900 J/kg°C.
Q = cmΔT
Q = (900 J/kg°C ) (2.0 kg) (110°C - 20°C)
Q = 162,000 J
Q = 1.62 x 105 J
Latent heat of fusion
Latent heat of vaporization
Latent Heat is the amount of energy needed to change the state of a mater at constant temperature.
Heat Transfer: Conduction
- Conduction involves the transfer of heat through direct contact
- Heat conductors conduct heat well, insulators do not
Heat Transfer: Convection
Heat Transfer: Radiation
A of particles?poor emitter would be a poor absorber.
A good emitter would also be a good absorber.Good and Bad Emitters/Absorbers