Three states of matter are solid, liquid and gas - Edexcel - GCSE Physics - Question 1 - 2016 - Paper 1
Question 1
Three states of matter are solid, liquid and gas.
(a) (i) Particles in each state of matter move in different ways.
Draw a line from each state of matter to the de... show full transcript
Worked Solution & Example Answer:Three states of matter are solid, liquid and gas - Edexcel - GCSE Physics - Question 1 - 2016 - Paper 1
Step 1
Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
When a gas is cooled, most of the particles D move slower. Cooling reduces the kinetic energy of particles, causing them to move more slowly.
Step 2
Complete the sentence by putting an (X) in the box next to your answer.
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Answer
When 20 °C is changed to Kelvin, it becomes C 293K. The conversion formula is K = °C + 273; thus, 20 + 273 = 293K.
Step 3
Calculate the new temperature of the air in the balloon in kelvin.
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Answer
Given the equation T2=ViVfTi
We substitute the known values:
Initial Volume, Vi=0.25 m3
Final Volume, Vf=0.10 m3
Initial Temperature, Ti=293K
Calculating:
T2=0.250.10×293=117.2K
So, the new temperature of the air in the balloon is approximately 117.2K.
Step 4
Suggest one way of increasing the volume of the balloon.
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Answer
One way of increasing the volume of the balloon is by increasing the temperature of the air inside it. Heating the air increases the kinetic energy of the particles, causing them to move apart and expand the volume.
