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Index
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Physics AQA A level
 »Â
Thermal
 »Â
Gases
level: Gases
Questions and Answers List
level questions: Gases
Question
Answer
How do REAL gases at moderate pressures and densities obey the gas laws?
Relativly closely
State how IDEAL gases at all pressures and densities obey the gas laws?
Perfectly
For REAL gases what casues electrostatic forces between molecules to break up
High pressure High density
Why does electrostatic forces between molecules becoming legible casue REAL gases to not follow the gas laws relativly closely
Cause the seperation of particles is reduced
What 3 physical conditions casue REAL gases to stop following the gas laws
High pressure Low temp High density
Why does low temperature for a REAL gas mean it doesnt follow the gas laws?
Begins to liquify Ke of molecules becomes too low
Whats the temperature in celsius at 0K
-273
What 3 reasons can be given as to why IDEAL gases obey the gas laws perfectely IGNORE THIS QUESTION I WRONG
No interaction between moleules Molecules have negiligible volume Molecules only have elastic collisoons ANSWER IS RAVED
State what Boyles law is
pV = constant Pressure x volume = constant
Assume temperature and no. moles stays constant If you were to increase the pressure, what would happen to the volume
Volume would decrease
State what Charles law is
v/t = constant Volume / temperaute = constant
Whats the graph of Boyles law look like? State the units and the axis
<3
What would Charles law graph look like State the units and axis
8==>
Assume pressure and no moles stays constant If you were to decrease the tempertaure, what would happen to the volume
Decrease volume
Whats the graph of charles law look like? State the axis and units
:)
Whats the graph of Pressure law look like? State the axis and units
UNDER PRESSURE... COMING DOWN ON MEEE
State what the Pressure law is
P/T = constant Pressure / temperature = constant
Assume volume and no. moles stays constant If you were to decrease the pressure, what would happen to the temperature This may be wrong?
Decrease