Unit 5: Thermal physics Flashcards
Give the equation calculating the required energy needed to change an objects temperature
Q = mcT
Where Q = energy, m = mass, c = specific heat capacity, T = change in temperature
Give the equation calculating the energy needed for a change in state
Q = ml
where l = specific latent heat
What is meant by fusion in the context of thermal physics
Changing a substance from solid to liquid without changing temperature
What is meant by vaporisation
Changing a substance from a liquid to gas without changing temperature
What is Boyle’s law
at a constant temperature, the pressure and volume of the gas are inversely proportional
What is Charles’s law
at constant pressure, the volume of a gas is directly proportional to its absolute
temperature
What is the pressure law
at constant volume, the pressure of a gas is directly proportional to
its absolute temperature
How does one convert Celsius to kelvin
K = C + 273
Give the ideal gas equation stating the variables
pV = nRT
where p = pressure, V = volume, n = number of moles, R = molar gas constant, T = temperature
How does one convert number of moles to molecules
N=nNa
where N = number of molecules, n = number of moles, Na = avagadros num
What is the Boltzman constant
k = R/Na
where k = constant, R = molar gas constant, Na = avagadro
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