203

SELF-ASSESSMENT CHECKLIST

I am able to … | Section | Not yet | Nearly there | Ready to move on
work with moles, molar mass, Avogadro’s number and number of molecules | 9.1 |  |  |
calculate the mass of a molecule given the molar mass | 9.1 |  |  |
be aware of the origin of pressure in a gas | 9.2 |  |  |
solve problems with the ideal gas law in various situations | 9.2 |  |  |
appreciate the quantitative relationship between the average random kinetic energy of molecules and the absolute temperature | 9.3 |  |  |
calculate the internal energy of an ideal gas | 9.3 |  |  |
calculate the internal energy of an ideal gas | 9.3 |  |  |

204

REFLECTION

Are you comfortable with the terms mole and Avogadro’s number? Do you know the assumptions behind the kinetic model of an ideal gas? Do you understand the origin of pressure in a gas? Can you solve problems using the gas laws? Do you understand the connection between kelvin temperature and average random kinetic energy? Do you understand the conditions under which a real gas behaves as an ideal gas?

Exam-style Questions

You can find questions in the style of IB exams in the digital coursebook.