Kinetic Theory & Ideal Gases (Edexcel A Level Physics): Exam Questions

Exam code: 9PH0

19 mins4 questions
1
1 mark

Which of the following graphs shows how the internal energy U of an ideal gas varies with the absolute temperature T of the gas?

Four graphs of internal energy U versus temperature T labelled A–D
A: linear graph through origin
B: linear graph starting at positive value of U 
C: upward curve with increasing gradient
D: upward curve with decreasing gradient
    2
    Sme Calculator
    4 marks

    The solar corona is the outermost layer of the Sun's atmosphere. It consists of a highly ionised gas called a plasma, and is composed mostly of protons and electrons.

    In a particular region of the corona, the temperature is 2.0×106 K and the number density of particles is about 1.1×1015 m3.

    A plasma can be considered to behave as an ideal gas when the mean thermal kinetic energy of the particles is much greater than the average electric potential energy between them.

    Deduce whether the plasma in the solar corona behaves as an ideal gas.