Expert Physics Tutoring

MS1 - Mark Scheme

- Matter is made up of tiny indivisible particles (1)

MS2 - Mark Scheme

- Particles are in constant, random motion (1)

- Particles collide and change direction frequently (1)

- This causes particles to spread out, leading to diffusion (1)

MS3 - Mark Scheme

- Boyle's Law: P₁V₁ = P₂V₂ (1)

- Substitute values: P₂ = (100kPa)(250cm³)/(500cm³) (1)

- Calculate new pressure: P₂ = 50 kPa (1)

MS4 - Mark Scheme

- Pascal (Pa) (1)

- Kilopascal (kPa) (1)

MS5 - Mark Scheme

- Heat increases the kinetic energy of the gas particles (1)

- Increased kinetic energy means particles move faster and collide more frequently (1)

- Collisions push against the balloon's walls, causing it to expand (1)

MS6 - Mark Scheme

- Pressure = Force / Area (1)

- Substitute values: Pressure = 500 N / 0.2 m² (1)

- Calculate pressure: Pressure = 2.5 kPa (1)

MS7 - Mark Scheme

- Boyle's Law: P₁V₁ = P₂V₂ (1)

MS8 - Mark Scheme

- Gas particles collide with the walls of the container (1)

- Collisions exert a force on the walls, causing pressure (1)

MS9 - Mark Scheme

- Work done by gas = P₁V₁ln(V₂/V₁) (1)

- Substitute values: Work done = (150 kPa)(10 liters)ln(20 liters/10 liters) (1)

- Calculate work done: Work done = 115.5 J (1)

MS10 - Mark Scheme

- Kinetic energy of gas particles decreases as temperature decreases (1)

- Particles collide with walls with less force (1)

- Lower collision force results in lower pressure (1)