EugeneC's answer to Elly's Secondary 1 Maths Singapore question.
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a) solid (S) , liquid (R) and gas (P,Q)
b) At -55 degree Celsius, P will be at liquid state. Draw the particles in a disorderly arrangement but close to each other.
At 0 degree Celsius, P will be in gaseous state. Draw the particles in a disorderly arrangement but far apart from each other.
Density = mass/volume
As substance S is being heated, the particles will move further apart from each other which causes the volume to increase. The mass will remain the same. As the volume increases, the density will decrease.
b) At -55 degree Celsius, P will be at liquid state. Draw the particles in a disorderly arrangement but close to each other.
At 0 degree Celsius, P will be in gaseous state. Draw the particles in a disorderly arrangement but far apart from each other.
Density = mass/volume
As substance S is being heated, the particles will move further apart from each other which causes the volume to increase. The mass will remain the same. As the volume increases, the density will decrease.
Date Posted:
4 years ago
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