P6 Flashcards
How to calculate density
Density = Mass/Volume (kg/m^3)
What is the conservation of mass?
When a substance changes state, the number of particles in the substance stays unchanged. So the mass of the substance is the same after the change as before the change
Internal energy?
Energy of the particles that is caused by their individual motion and positions. The internal energy of the particles is the sum of kinetic + the potential energy
Why are the particles of a gas in terms of attraction weak?
Because the particles of a gas move about in high speeds in random directions, colliding with each other and the internal surfaces of the balloon.
What is specific latent heat of fusion?
Is the energy needed to change the state of 1kg of the substance from solid to liquid, at its melting point(without changing its temperature).
How do you work out specific latent heat of fusion?
SLHOF= Energy/Mass (J/kg)
What is specific latent heat of vaporisation?
Is the energy needed to change the state of 1kg of the substance from liquid to vapour, at its boiling point (without changing its temperature).
How to work out specific latent heat of vaporisation?
SLHOV= energy/mass (J/kg)
Why would thing burst if they are sealed?
Because when the temperature increases, the pressure of the gas inside it increases.
What is the equation of Boyle’s Law?
Pressure x volume= constant (Pa and m^3)
How does a states of matter graph go?
A to B = the substance starts to warm
B to C = the substance is melting
C to D= the substance is going to boil at 100°c
