Specific Heat
Phase Changes
Methods of Separation
Classification
100
When energy is released, the value for heat will be this (positive/negative)
What is positive?
100
Letter B represents this on the phase diagram
What is liquid?
100
Filtration would work to separate these states of matter.
What is liquid and solid?
100
Antimony is an example of this.
What is an element?
200
A metal has a mass of 23.5 g, a specific heat of 0.288 J/goC, and temperature went from 25.0oC to 55.0oC. This is the energy.
What is -203 J?
200
This is what the phase change from solid to gas is called.
What is sublimation?
200
This method of separation is based on boiling point
What is distillation?
200
A glue gun melting a stick of glue is an example of this.
What is a physical change?
300
49 J of energy is used to heat an object with a mass of 1.243 g from 15.3oC to 47.8oC. This is the specific heat.
What is 1.2 J/goC?
300
This is what is occurring at #4 on the graph
What is boiling?
300
This image displays this method of separation.
What is chromatography?
300
Rust is an example of this.
What is a chemical change?
400
What temperature must a 50.0 g piece of glass start at if it absorbs 475 joules of heat and its specific heat capacity is 0.20 J/g°C? The final temperature of the glass is 70.5°C.
What is 23°C?
400
At 1.50 atm, this is the melting point.
What is ~150 oC
400
In the separation lab, filtration was NOT successful for this type of substance.
What is homogeneous mixture/two liquids
400
Vitamin C (ascorbic acid, C6H8O6) is an example of this.
What is a pure substance/compound?
500
If the substance is at 400oC and 0.75 atm, this is what must be done to have the substance condense.
What is increase pressure?
500
A student has a mixture of sand and salt dissolved in water. These are the methods of separation.
Filtration then evaporation/distillation
500
This is an example of a homogeneous mixture
(Answers may vary)