Thermal & Gases Quiz Flashcards
Pressure = …
Force / Area
Heating without a change of state causes which energy to increase…
Kinetic
Heating with a change of state causes which energy to increase…
Potential
Describe the arrangement and motion of particles in a solid…
Tightly packed
Held in a fixed pattern
Vibrate about fixed positions
Describe the arrangement and motion of particles in a liquid…
Tightly packed
Can slide over each other
Fill the container they are in
Describe the arrangement and motion of particles in a gas…
Very spread out
Move with rapid, RANDOM MOTION
Units of specific heat capacity…
J/kg °C
Temperature time graphs show…
Constant temperature during a change of state (Potential energy is changing)
Definition of specific heat capacity
The heat required to raise the temperature of 1kg of a given substance by 1°C
Equation for specific heat capacity
ΔE (Change in energy) = m (mass) x c (specific heat capacity) x ΔT (Change in temp)
What is absolute zero
Where all motion of particles stops
0 Kelvin in Celsius
-273
Explain why an increase in temperature results in an increase in the average speed of gas molecules
Increase in heat energy increases the kinetic energy of the particles, speeding them up
Relationship between pressure and Kelvin temperature for gas in a sealed container.
p1 / T1 = p2 / T2
Relationship between the pressure and volume of a fixed mass of gas at a constant temperature
p1V1 = p2V2
