Kinetic theory and gas behaviourIB MYP Physics: Flashcards

What these 13 flashcards ask

What causes gas pressure?
What is temperature a measure of?
What happens to gas particles when a gas is heated?
What is absolute zero?
How do you convert °C to K?
How do you convert K to °C?
Convert 27 °C to kelvin.
Why does gas pressure rise when the temperature rises at constant volume?
Why does pressure rise when volume is reduced at constant temperature?
State Boyle's law.
Write the equation for Boyle's law.
A gas at 100 kPa and 60 cm³ is compressed to 20 cm³ at constant temperature. What is the new pressure?
What must stay constant for Boyle's law to apply?

Exam questions on Kinetic theory and gas behaviour

A cyclist in Amsterdam leaves a sealed bicycle tyre in the sun. The volume of the tyre stays the same, but the temperature of the air inside it rises from 15 °C to 45 °C.
Explain why the pressure inside the tyre rises as the temperature rises.2 marks
A bicycle pump contains 120 cm³ of air at a pressure of 100 kPa. The outlet is blocked, and the piston is pushed in slowly until the air occupies 40 cm³. The pump is pushed in slowly, so the temperature of the air stays constant.
The piston is pushed in further, until the volume is 30 cm³. Calculate the new pressure.2 marks
A class in Auckland investigates how the pressure of a fixed mass of air changes with its temperature. Air is sealed in a rigid flask connected to a pressure gauge, and the flask is heated in a water bath. The pressure is 100 kPa at 20 °C, 107 kPa at 40 °C, 114 kPa at 60 °C and 121 kPa at 80 °C.
State a testable hypothesis for this investigation and give a scientific reason for it.3 marks

Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).