Figure 6 shows helium gas inside a container - Edexcel - GCSE Physics - Question 3 - 2022 - Paper 1
Question 3
Figure 6 shows helium gas inside a container.
(a)
(i) Draw an arrow on Figure 6 to show the direction of the force due to the helium gas, at the point labelled X.
... show full transcript
Worked Solution & Example Answer:Figure 6 shows helium gas inside a container - Edexcel - GCSE Physics - Question 3 - 2022 - Paper 1
Step 1
Draw an arrow on Figure 6 to show the direction of the force due to the helium gas, at the point labelled X.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The arrow should point perpendicular (normal) to the surface of the container at point X, indicating the direction of the force exerted by the gas.
Step 2
Explain, in terms of particles, why the helium gas exerts a force on the sides of the container.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The particles of helium gas are in random motion. As these particles collide with the sides of the container, they exert a force on the surface due to the change in momentum during these collisions. The more frequent these collisions are, the greater the force exerted on the sides.
Step 3
Calculate the pressure P₂ after the gas is compressed.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Using the formula with Boyle's Law: P₁V₁ = P₂V₂,
Substituting the values:
105 kPa × 2.3 m³ = P₂ × 0.20 m³,
the calculation gives P₂ = 1200 kPa.
Step 4
Comment on the shop's claim.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
From the table, the volume of gas available at 105 kPa is 2.3 m³. To find how many balloons of 0.007 m³ can be filled:
The calculation is:
( \text{Number of Balloons} = \frac{2.3 \text{ m}^3}{0.007 \text{ m}^3} \approx 328.57 ).
This means that the shop can fill approximately 328 balloons, which is greater than the claimed 30, thus supporting the shop's claim.
