physics ch 12

temperature

reported in degrees celsius or degrees fahrenheit

celsius to fahrenheit

1C=9/5F

Kelvin

a temperature scale, SI base unit of temeprataure

Kelvin equation

T=Tc +273.15

thermometric property

a property that changes with temperature

thermometers

make use of the change in some physical property with temperature

linear thermal expansion of a solid

the length of an object changes when its temperature changes

linear thermal expansion equation

change in L=a x Li x change in T

Elastic Deformation equation

F=Y(change in L/Li)A

Volume thermal expansion

the volume of an object changes when its temperature changes

volume thermal expansion equation

change in V= b x Vi x change in T

heat

is energy that flows from a higher temperature object to a lower temperature object because of a difference in temperatures, unit is joules

heat and temperature change

the heat that must be supplied or removed to change the temperature of a substance is

heat and temperature change equation

Q=m x c x change in T

heat and temperature change in gases

the value of the specific heat of a gas depends on whether the pressure or volume is held constant

Calorimetry

if there is no heat loss to the surroundings, the heat lost by the hotter object equals the heat gained by the cooler ones

heat and phase change

during a phase change, the temperature of the mixture does not change

Latent heat equation

Q= m x L(latent heat)