Heat Flashcards
Define Temperature
A measure of the hotness or coldness of a body
What is the Celsius scale used for
Everyday life, 100° is boiling and 0° is freezing
What is the Kelvin scale used for
Mostly used in scientific calculations, beginning at absolute zero (-273.15°C)
What is a thermometric property
It is a physical process that changes with temperature repeatedly and measurably
Examples of thermometric properties
Length of a column of liquid, gas pressure/volume, colour of crystals, electrical resistance
What is Heat
It is a form of energy that causes a rise in temperature when added and a fall in temperature when removed.
What is the unit for heat capacity and what is it
C, it is the amount of energy required to change the temperature of a substance by 1°K
Define specific heat capacity
The amount of energy required to change the temperature of 1Kg of a substance by 1°K
What is the unit for SHC
J/kg/K
What is Latent heat
A hidden form of energy, the energy required to change the state of a substance without a change in temperature
What is LHF
Energy required to change from a liquid to a solid or a solid to a liquid without a change in temperature
What is LHV
The energy required to change a substance from a liquid to a gas or a gas to a liquid without a change in temperature
What is SLH
The amount of energy required to change the state of 1Kg of a substance without a change in temperature, measured in J/kg
What is the formula for specific latent heat
Q = mL, Q = heat energy, m = mass, L = latent heat
What is the formula for specific heat capacity
Q = mc∆theta, c = specific heat capacity, ∆theta = change in temperature
