Particles Flashcards
What happens when a substance changes state?
The particles gain or lose energy.
What is the equation to find the density of a substance?
Mass (kg)
Density (kg/m³) = ——————-
volume (m³)
What is the specific heat capacity?
The thermal energy that must be transferred to change the temperature of 1kg of a material by 1°C.
What is the equation to find the change in thermal energy using the specific heat capacity?
Change in = mass x specific heat x change in
thermal energy capacity temperature
What is specific latent heat?
The energy that must be transferred to change 1kg of a material from one state of matter to another.
What does gas pressure depend on?
The motion of the particles in the gas.
What does the pressure of a gas produce?
A net force at right angles to the wall.
How can pressure be increased?
- Increasing the temperature of the gas
- Increasing the mass of the gas
- Decreasing the volume of the gas
What is absolute zero?
-273°C (0 Kelvin)
How do you convert from Celsius to Kelvin?
Add 273°C
How do you convert from Kelvin to Celsius?
Minus 273°C
What is the temperature of the gas directly proportional to?
The kinetic energy of the gas molecules.
What is the change in the volume of a gas inversely proportional to?
The change in pressure when the mass and temperature are constant.
What is the equation relating pressure and volume?
P (1) x V (1) = P (2) X V (2)
What are the units for pressure?
Pascals (Pa)
