Chapter 10 Heat and Heat technology Flashcards
temperature
a measure of the average kinetic energy of the particles in an object
thermal expansion
increase in the size of a substance in response to an increase in the temperature of the substance
absolute zero
the temperature at which molecular energy is at a minimum 0 K -273.16C
Bimetallic Strip
Used in thermostats, two different metals stacked in a thin strip.
Heat
the energy transferred between object that are at different temperatures
Thermal energy
kinetic energy of a substances atoms
Thermal conduction
the transfer of energy as heat trough a material
thermal conductors
a material through which energy can be transferred as heat
thermal insulator
a material that reduces or prevents the transfer of heat
convection
the transfer of thermal energy by the circulation of movement of a liquid or gas
radiation
the transfer of energy as electromagnetic waves
specific heat
the quantity of heat required to raise a unit mass of homogeneous material 1 K or 1 C in a specified way given a constant pressure and volume
states of matter
the physical forms of matter which include solid liquid and gas
change of state
the change of a substance from one physical state to another
insulation
a substance that reduces the transfer of electricity heat or sound
heat engine
a machine that transforms heat into mechanical energy or work
thermal pollution
a temperature increase in a body of water that is caused by human activity and that has a harmful effect on the water quality and on the abilityof that body of water to support life
Explain how a refrigerator works
It uses a compressor and coolant to do work and transfer the thermal energy outside of the cooling area.
Types of Heating
Hot water
Warm Air
Solar Heating
Calorie
unit of energy used to measure chemical energy in food.
Calrimeter
a device that measures heat.
3 states of matter
gas, liquid, and solid, Know about these as well
Equation for calculating Heat
Heat(J) = Specific Heat (J/kg*C) * mass (kg) * change in temperature (C)
Celsius to Kelvin Equation
T(C)+273.15
