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Thermal physics (A-level only)

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Question 14

A sample X\text{X}X of helium gas (molar mass = 4.0 g mol-1) has a mass of 6.0 g and is at an absolute temperature TTT. The total random kinetic energy of the molecules in sample X\text{X}X is EEE.

Another sample Y\text{Y}Y of argon gas (molar mass = 40 g mol-1) has a mass of 30 g and is at an absolute temperature 3T3T3T.

Both gases behave as ideal gases. What is the total random kinetic energy of the molecules in sample Y\text{Y}Y?

A

23E\frac{2}{3} E32​E

B

6E6 E6E

C

32E\frac{3}{2} E23​E

D

15E15 E15E

Markscheme

Thermal physics (A-level only) Questions

  1. A Level
  2. /Physics
  3. /Thermal physics (A-level only)

48 exam-style questions on AQA A Level Physics Thermal physics (A-level only), covering Thermal energy transfer (A-level only), Ideal gases (A-level only), and Molecular kinetic theory model (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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