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Thermodynamics, space and oscillations
Quick questions on Thermal energy and gases: heat capacity, gas laws and kinetic theory - Edexcel A-Level Physics
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are the ideal gas laws?Show answer
Temperatures in these laws must be in kelvin. An ideal gas is one that obeys exactly; real gases approach this at low pressure and high temperature.
What is kinetic theory?Show answer
The kinetic theory models a gas as many tiny particles in random motion, colliding elastically with the walls and each other. Deriving the pressure from the rate of change of molecular momentum at the walls gives:
What is q1?Show answer
State what absolute temperature measures at the molecular level. [1 mark]
What is q2?Show answer
Find the energy to heat kg of water by K. Take J per kg per K. [2 marks]
What is q3?Show answer
A gas at Pa and cubic metres is compressed at constant temperature to cubic metres. Find the new pressure. [2 marks]
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