Matter Quizs 2- Changes of state

Physical change

• Change that results in new substances being made.

• Change in state that does not result in new substances being made.

• Change that alters the chemical composition of a substance.

• Change that occurs only at high temperatures.

Density

• Mass/volume, usually measured in kg/m³.

• Weight/area, usually measured in g/cm².

• Volume/mass, usually measured in m³/kg.

• Mass/length, usually measured in kg/m.

Change of state

• The process of moving from one physical state to another, for example, melting.

• The process of increasing temperature without changing state.

• The process of cooling down a substance to solidify it.

• The process of mixing two different states of matter.

Mass

• The amount of energy in an object, usually measured in joules.

• The amount of matter, usually measured in kilograms.

• The force exerted by gravity on an object, usually measured in newtons.

• The volume of an object, usually measured in liters.

Joule (J)

• A unit of power.

• The unit of energy.

• A unit of force.

• A unit of mass.

Specific latent heat of fusion (or melting)

• The energy required to fuse or melt 1 kg of a substance.

• The energy required to vaporize 1 kg of a substance.

• The energy required to heat 1 kg of a substance by 1 degree Celsius.

• The energy required to freeze 1 kg of a substance.

Internal energy

• The energy of a system because of the arrangement and movement of particles in it.

• The total energy of all the chemical bonds in a substance.

• The energy stored in the gravitational field of an object.

• The energy associated with the temperature of a system.

Chemical reaction

• Process in which substances react to form different substances.

• A method of separating mixtures into their individual components.

• A physical change that does not alter the chemical composition.

• A technique used to measure the concentration of a solution.

Degree Celsius (°C)

• A unit of temperature.

• A measure of length.

• A type of pressure unit.

• A scale for measuring weight.

Specific latent heat of vaporisation

• The energy required to vaporise or condense 1 kg of a substance.

• The energy required to heat 1 kg of a substance by 1 degree Celsius.

• The energy required to freeze 1 kg of a substance at its melting point.

• The energy required to change 1 kg of a substance from solid to liquid.