Temperature and Heat Flashcards
degree of hotness or coldness measured on a definite scale
Temperature
states that “ two objects are in thermal equilibrium if and only if they have the same temperature “
- if A and B are each in thermal equilibrium w/ C, A and B are in thermal equilibrium w/ each other
Zeroth Law of Thermodynamics
TRUE/FALSE.
thermal equilibrium isn’t affected by adding/removing insulators
TRUE
when the temp. of two systems are different, they ____________
cannit be in thermal equilibrium
changes it temp.cause the liquid’s volune to change
thermometer
changes in temp. cause the pressure of the gas to change
Pressure value
temperature depends on ______
particle movement
TRUE/FALSE.
motion of the atoms gives the object energy
TRUE
“particles that make up atom are constantly in motion”
Kinetic Theory of Matter
Solid = _______ atoms
Liquid = _________ atoms
Gas = _________ atoms
Plasma = _________ atoms
vibrating
flowing
move freely
move very fast and freely
- measure of the avg. KE of all particles in the object
- determined by the atom’s mass and speed
Temperature
Convert °C to F
TF = 9/5 TC + 32°C
Convert F to °C
TC = 5/9 ( TF - 32°)
Convert C to K
TK = TC + 273.15
Convert F to R
TR = TF + 459.67
° C —-
C° —–
temperature reading
change in temperature
when temperature increases, most materials _______
expand
TRUE/FALSE.
Water expands when heated or when it freezes
TRUE
a transfer of energy from one sunstance to another
temperature change
occurs when there is a temperature difference
energy transfer
energy transfer that takes place bcoz of a temp. difference
heat transfer/heat flow
energy flows from _________ to _______
hotter to colder object
energy transferred between objects w/ temperature differences
Heat
amount of heat required to raise the temp. of 1gram of water from 14.5 °C to 15.5°C
calorie
anount of heat required to raise the temp. of 1 pound of water by F° from 63 F° to 64 F°
British thermal unit (Btu)
depends on the physical state of a material
Temperature
the quantitative description of the object’s hotness and coldness
Temperature
refers to the energy in transit from one body or system to another bcoz of a temperature difference
Heat
We can change the temp of a body by
adding or removing heat
the amount of heat that must be added/removed from a unit mass of the substance to raise its temp. by 1 °C
Specific heat capacity, c
quantity of heat of required to change the temp. of unit mass of substance by 1 K
specific heat, c
TRUE /FALSE
Same Q, same mass (same material, constant mass)
TRUE
objects w/ higher c has ______
less change in T
more heat= ______
greater temperature change
TRUE/FALSE.
transfer of energy thru heat follows the CONSERVATION OF ENERGY
TRUE
Transfer of Energy thru heat follows the conservation of energy:
if a warmer object A and cooler object B are in contact and achieve thermal equilibrium, assuming no heat is lost to the surroundings, then the sum of the energy transferred from object A and the energy received by object B is equal to ______
ZERO
