Did you hear about the guy that got cooled to absolute zero? He's 0 K now
What is heat?
movement of thermal energy from a higher temperature to one of lower temperature
What type of thermal energy transfer is demonstrated by a metal rod becoming hot over its entire length when one end is placed in a fire
conduction
What are the two fiduciary points for Celsius and Kelvin?
absolute zero and the triple point of water
True/False: Fahrenheit is the most commonly used temperature scale worldwide.
False
A change in a system's energy is equal to the energy transferred to the system.
First Law of Thermodynamics
The sum of kinetic energy of all the particles in an object is its _____________
thermal energy
What type of thermal energy transfer is demonstrated by a heat lamp keeping food hot?
radiation
Which of the following temperatures represents absolute zero?
0 F
0 C
0 K
All of them
0 K
True/False: Ancient Greeks believed that heat and fire were the same thing
Absolute zero can never be achieved.
Third Law of Thermodynamics
True or False An ice cube feels cold because thermal energy moves from the ice cube to your hand.
False
energy always moves from area of high temperature to lower temperature
What type of thermal energy transfer is demonstrated by the rising of a hot air balloon?
Convection
The freezing point of water is which of the following or all?
0 F
32 C
273.15 K
273.15 K
Both are units of energy.
1 Cal = 1 kcal = 1,000 cal.
Energy can flow from a colder object to a warmer object only if something does work.
Second Law of Thermodynamics
What is a characteristic that changes in a predictable way with changes in temperature?
thermometric property
What is an energy transfer in the form of electromagnetic waves?
Radiation
For a thermometer to produce reproducible measurements, it must be constructed with what?
two known fiduciary points
The idea that heat comes from the constant motion of particles is described by the __________ model.
kinetic-molecular
Energy cannot be created nor destroyed
First Law of Thermodynamics
Thermal energy is most effected by what two aspects?
temperature and the number of particles
The transfer of thermal energy caused by the colliding particles of two objects in contact with each other is called what?
conduction
Two objects in contact with each other will continue to transfer thermal energy until?
the objects have the same temperature
Rumford’s cannon-boring experiment revealed that a dull drill produced ___________ heat as _____________ metal was cut?
more; less
The only way to reduce an object's temperature is to increase the entropy of the environment.
2nd Law of Thermodynamics