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Endothermic phase changes - the substance is gaining energy (being heated) and the molecules are getting more active.
- solid to liquid: melting
- liquid to gas: vaporization
- solid to gas: sublimation
Exothermic phase changes - the substance is losing energy (cooling) and the molecules are slowing down.
- gas to liquid: condensation
- liquid to solid: freezing
- gas to solid: deposition
Memory helper: exo is like exit, and the heat energy exits the substance during an exothermic phase change.
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Is energy required for each phase change?
Yes energy reqired during each phase change process. solid to liquid(water) = 333.7 Kj/kg liquid to vapour(water) =2257.1Kj/kg
What is the phase change from a solid to a liquid?
The phase change from a solid to a liquid is called "melting."
What is the phase change from plasma to a gas?
The phase change from a plasma to a gas is called recombination.
What do you think will happen to the temperature of a substance during a phase change?
Typically, the temperature doesn't change during a phase change.
What A steep slope on a phase-change graph indicates?
Different
What is the term used to describe the phase change of a liquid to gas?
The phase change from a liquid to a gas is called evaporation.
Describe at least 2 things that happen in each phase of Meiosis?
nugger
What two phases describe dynamic equilibrium?
the total number of molecules in each phase stays constant
Is energy required for each phase change?
Yes energy reqired during each phase change process. solid to liquid(water) = 333.7 Kj/kg liquid to vapour(water) =2257.1Kj/kg
Evaporton is a phase change form?
Evaporation is not a phase change form i is a process by which phase change.
What are the processes in changing one phase to another phase of matter?
Changes in state are called phase transitions. Each of the phase transitions has a technical name and many have common names. The change from solid to liquid is fusion (or melting). The change from liquid to solid is solidification (or freezing). The change from liquid to gas is vaporization (or boiling). The change from gas to liquid is condensation. The change from solid to gas is sublimation.
Describe refrigerant properties of density?
A refrigerant is a compound use in a heat cycle that undergoes a phase change from a gas to a liquid and black
What is the phase change in a boiling point?
What is the phase change in evaporation
When iodinebecome to purple gas describe chemical properties?
Iodine sublimes into a purple gas without passing through a liquid phase. This is a change in physical state, which is a physical change.
What is the phase change that is reverse of vaporation?
Condensation
Is there any liquid state of sublime substances?
Sublimation is defined as a phase change from a solid into a gas without passing through a liquid phase in between. In some other fields of science, e.g. psychology, the word is also used to describe a change of state.
How do you get a change of phase?
Change of phase is caused 99% of the time by a change in temperature or pressure.
