6 Changes of State Flashcards
If the specific heat capacity of water is 4200 J/kg°C, how much energy is needed to raise 1 kg of
water by 2°C?
8400 J
What is the unit for Energy?
Joules
Which material has the lowest specific heat capacity? How do you know?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/276/108/603/q_image_thumb.png?1518568782)
aluminium
It requires less energy for the same temperature change as water.
Which state of matter has a fixed volume but an indefinite shape?
liquid - it has a fixed volume but can take the shape of its container
Describe the particle movement in a solid
- vibrating in fixed positions
What is the equation linking energy, mass, specific heat capactiy and change in temperature?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/276/108/611/a_image_thumb.jpg?1518575353)
If the force of attraction between particles in a liquid is moderate, how does this change when in gaseous form?
- the force of attraction between particles is very weak or negligible, the particles move freely and are far apart in a gas.
What safety precautions must be taken when finding the specific heat capacity of water?
- heater and water will be hot- handle with care, let cool before clearing away
- water and electricity may lead to an electric shock- do not operate equipment with wet hand, check insulation on wires is intact before using.
Sketch a typical heating curve for a substance.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/276/108/615/a_image_thumb.jpg?1518575457)
Name the three states of matter
solid, liquid and gas
gas to solid
Name the change of state
![](https://s3.amazonaws.com/brainscape-prod/system/cm/276/108/618/q_image_thumb.jpg?1518599374)
deposition
How is kinetic energy of a substance related to its temperature?
Kinetic energy is proportional to the average kinetic energy of the particles in the substance
gas to liquid
Name the change of state
condensation
![](https://s3.amazonaws.com/brainscape-prod/system/cm/276/108/623/a_image_thumb.jpg?1518599419)
Describe the particle movement in a gas
- moving fast and moving freely
How is the energy supplied to the water calculated when finding the specific heat capacity of water?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/276/108/630/q_image_thumb.png?1518570101)
E = IVt
Energy = Current (A) x voltage (V) x time (s)
How do you improve accuracy when measuring the mass of a metal block using a balance?
- tare balance before use
- place balance on level surface